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1940fcdd2915697a7d213043dcd45260bf5b2eda
gem5/system/alpha/palcode/platform_m5.s
Ali Saidi 1940fcdd29 changes to make smp work in linux 
console/console.c:
    Remove Printed SimOS references and replace with M5
    Rework the SMP stuff, so we don't trash any stacks, or what we
    thought were stacks, but are actually other ppls memory.
console/dbmentry.s:
    add a carefully crafted piece of assembly that doesn't use the stack,
    so we don't clobber anthing in the time between when we are spinning
    and when the OS tells us to go.
palcode/platform_m5.s:
    add/fix code for IPI, multiprocessor interrupts (DIR), and initial
    bootstrapping of the cpu
2004-09-01 00:23:00 -04:00

2726 lines
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// build_fixed_image: not sure what means
// real_mm to be replaced during rewrite
// remove_save_state remove_restore_state can be remooved to save space ??
#define egore 0
#define acore 0
#define beh_model 0
#define ev5_p2 1
#define ev5_p1 0
#define ldvpte_bug_fix 1
#define spe_fix 0
#define osf_chm_fix 0
#define build_fixed_image 0
#define enable_p4_fixups 0
#define osf_svmin 1
#define enable_physical_console 0
#define fill_err_hack 0
#define icflush_on_tbix 0
#define max_cpuid 1
#define perfmon_debug 0
#define rax_mode 0
#define hw_rei_spe hw_rei
#include "ev5_defs.h"
#include "ev5_impure.h"
#include "ev5_alpha_defs.h"
#include "ev5_paldef.h"
#include "ev5_osfalpha_defs.h"
#include "fromHudsonMacros.h"
#include "fromHudsonOsf.h"
#include "dc21164FromGasSources.h"
#include "cserve.h"
#include "tlaserreg.h"
//#include "simos.h"
#define ldlp ldl_p
#define ldqp ldq_p
#define stlp stl_p
#define stqp stq_p
#define stqpc stqp
#ifdef SIMOS
#define ldqpl ldq_p
#define sdqpl sdq_p
#else
<--bomb>
#endif
#define pt_entInt pt_entint
#define pt_entArith pt_entarith
#define mchk_size ((mchk_cpu_base + 7 + 8) &0xfff8)
#define mchk_flag CNS_Q_FLAG
#define mchk_sys_base 56
#define mchk_cpu_base (CNS_Q_LD_LOCK + 8)
#define mchk_offsets CNS_Q_EXC_ADDR
#define mchk_mchk_code 8
#define mchk_ic_perr_stat CNS_Q_ICPERR_STAT
#define mchk_dc_perr_stat CNS_Q_DCPERR_STAT
#define mchk_sc_addr CNS_Q_SC_ADDR
#define mchk_sc_stat CNS_Q_SC_STAT
#define mchk_ei_addr CNS_Q_EI_ADDR
#define mchk_bc_tag_addr CNS_Q_BC_TAG_ADDR
#define mchk_fill_syn CNS_Q_FILL_SYN
#define mchk_ei_stat CNS_Q_EI_STAT
#define mchk_exc_addr CNS_Q_EXC_ADDR
#define mchk_ld_lock CNS_Q_LD_LOCK
#define osfpcb_q_Ksp pcb_q_ksp
#define pal_impure_common_size ((0x200 + 7) & 0xfff8)
#define ALIGN_BLOCK \
.align 5
#define ALIGN_BRANCH \
.align 3
#define EXPORT(_x) \
.align 5; \
.globl _x; \
_x:
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
// XXX the following is 'made up'
// XXX bugnion
// XXX bugnion not sure how to align 'quad'
#define ALIGN_QUAD \
.align 3
#define ALIGN_128 \
.align 7
#define GET_IMPURE(_r) mfpr _r,pt_impure
#define GET_ADDR(_r1,_off,_r2) lda _r1,_off(_r2)
#define BIT(_x) (1<<(_x))
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
// XXX back to original code
// .sbttl "System specific code - beh model version"
//
// Entry points
// SYS$CFLUSH - Cache flush
// SYS$CSERVE - Console service
// SYS$WRIPIR - interprocessor interrupts
// SYS$HALT_INTERRUPT - Halt interrupt
// SYS$PASSIVE_RELEASE - Interrupt, passive release
// SYS$INTERRUPT - Interrupt
// SYS$RESET - Reset
// SYS$ENTER_CONSOLE
//
// Macro to read TLINTRSUMx
//
// Based on the CPU_NUMBER, read either the TLINTRSUM0 or TLINTRSUM1 register
//
// Assumed register usage:
// rsum TLINTRSUMx contents
// raddr node space address
// scratch scratch register
// .macro Read_TLINTRSUMx rsum, raddr, scratch, ?label1, ?label2
//
// nop
// mfpr 'scratch', pt_whami // Get our whami (VID)
//
// extbl 'scratch', #1, 'scratch' // shift down to bit 0
// lda 'raddr', ^xff88(r31) // Get base node space address bits
//
// sll 'raddr', #24, 'raddr' // Shift up to proper position
// srl 'scratch', #1, 'rsum' // Shift off the cpu number
//
// sll 'rsum', #22, 'rsum' // Get our node offset
// addq 'raddr', 'rsum', 'raddr' // Get our base node space address
//
// blbs 'scratch', label1
// lda 'raddr', <tlep$tlintrsum0_offset>('raddr')
//
// br r31, label2
//label1: lda 'raddr', <tlep$tlintrsum1_offset>('raddr')
//
//label2: ldlp 'rsum', 0('raddr') // read the right tlintrsum reg
//.endm
#define Read_TLINTRSUMx(_rsum,_raddr,_scratch) \
nop; \
mfpr _scratch,pt_whami; \
extbl _scratch,1,_scratch; \
lda _raddr,0xff88(zero); \
sll _raddr,24,_raddr; \
srl _scratch,1,_rsum; \
sll _rsum,22,_rsum; \
addq _raddr,_rsum,_raddr; \
blbs _scratch,1f; \
lda _raddr,0x1180(_raddr); \
br r31,2f; \
1: \
lda _raddr,0x11c0(_raddr); \
2: ldlp _rsum,0(_raddr)
//
// Macro to write TLINTRSUMx
//
// Based on the CPU_NUMBER, write either the TLINTRSUM0 or TLINTRSUM1 register
//
// Assumed register usage:
// rsum TLINTRSUMx write data
// raddr node space address
// scratch scratch register
// .macro Write_TLINTRSUMx rsum, raddr, whami, ?label1, ?label2
//
// nop
// mfpr 'whami', pt_whami // Get our whami (VID)
//
// extbl 'whami', #1, 'whami' // shift down to bit 0
// lda 'raddr', ^xff88(r31) // Get base node space address bits
//
// sll 'raddr', #24, 'raddr' // Shift up to proper position
// blbs 'whami', label1
//
// lda 'raddr', <tlep$tlintrsum0_offset>('raddr')
// br r31, label2
//
// label1: lda 'raddr', <tlep$tlintrsum1_offset>('raddr')
// label2: srl 'whami', #1, 'whami' // Shift off the cpu number
//
// sll 'whami', #22, 'whami' // Get our node offset
// addq 'raddr', 'whami', 'raddr' // Get our base node space address
//
// mb
// stqp 'rsum', 0('raddr') // write the right tlintrsum reg
// mb
// ldqp 'rsum', 0('raddr') // dummy read to tlintrsum
// bis 'rsum', 'rsum', 'rsum' // needed to complete the ldqp above -jpo
// .endm
#define Write_TLINTRSUMx(_rsum,_raddr,_whami) \
nop; \
mfpr _whami,pt_whami; \
extbl _whami,1,_whami; \
lda _raddr,0xff88(zero); \
sll _raddr,24,_raddr; \
blbs _whami,1f; \
lda _raddr,0x1180(_raddr);\
br zero,2f; \
1: lda _raddr,0x11c0(_raddr);\
2: srl _whami,1,_whami; \
addq _raddr,_whami,_raddr; \
mb; \
stqp _rsum,0(_raddr); \
ldqp _rsum,0(_raddr); \
bis _rsum,_rsum,_rsum
//
// Macro to determine highest priority TIOP Node ID from interrupt pending mask
//
// Assumed register usage:
// rmask - TLINTRSUMx contents, shifted to isolate IOx bits
// rid - TLSB Node ID of highest TIOP
//.macro Intr_Find_TIOP rmask, rid, ?l1, ?l2, ?l3, ?l4, ?l5, ?l6
// srl 'rmask', #4, 'rid' // check IOP8
// blbc 'rid', l1 // not IOP8
//
// lda 'rid', 8(r31) // IOP8
// br r31, l6
//
// l1: srl 'rmask', #3, 'rid' // check IOP7
// blbc 'rid', l2 // not IOP7
//
// lda 'rid', 7(r31) // IOP7
// br r31, l6
//
// l2: srl 'rmask', #2, 'rid' // check IOP6
// blbc 'rid', l3 // not IOP6
//
// lda 'rid', 6(r31) // IOP6
// br r31, l6
//
// l3: srl 'rmask', #1, 'rid' // check IOP5
// blbc 'rid', l4 // not IOP5
//
// lda 'rid', 5(r31) // IOP5
// br r31, l6
//
// l4: srl 'rmask', #0, 'rid' // check IOP4
// blbc 'rid', l5 // not IOP4
//
// lda r14, 4(r31) // IOP4
// br r31, l6
//
// l5: lda r14, 0(r31) // passive release
// l6:
// .endm
#define Intr_Find_TIOP(_rmask,_rid) \
srl _rmask,3,_rid; \
blbc _rid,1f; \
lda _rid,8(zero); \
br zero,6f; \
1: srl _rmask,3,_rid; \
blbc _rid, 2f; \
lda _rid, 7(r31); \
br r31, 6f; \
2: srl _rmask, 2, _rid; \
blbc _rid, 3f; \
lda _rid, 6(r31); \
br r31, 6f; \
3: srl _rmask, 1, _rid; \
blbc _rid, 4f; \
lda _rid, 5(r31); \
br r31, 6f; \
4: srl _rmask, 0, _rid; \
blbc _rid, 5f; \
lda r14, 4(r31); \
br r31, 6f; \
5: lda r14, 0(r31); \
6:
//
// Macro to calculate base node space address for given node id
//
// Assumed register usage:
// rid - TLSB node id
// raddr - base node space address
//.macro Get_TLSB_Node_Address rid, raddr
// sll 'rid', #22, 'rid' // Get offset of IOP node
// lda 'raddr', ^xff88(r31) // Get base node space address bits
//
// sll 'raddr', #24, 'raddr' // Shift up to proper position
// addq 'raddr', 'rid', 'raddr' // Get TIOP node space address
// .iif ne turbo_pcia_intr_fix, srl 'rid', #22, 'rid' // Restore IOP node id
//.endm
#define turbo_pcia_intr_fix 0
#if turbo_pcia_intr_fix != 0
#define Get_TLSB_Node_Address(_rid,_raddr) \
sll _rid,22,_rid; \
lda _raddr,0xff88(zero); \
sll _raddr,24,_raddr; \
addq _raddr,_rid,_raddr; \
srl _rid,22,_rid
#else
#define Get_TLSB_Node_Address(_rid,_raddr) \
sll _rid,22,_rid; \
lda _raddr,0xff88(zero); \
sll _raddr,24,_raddr; \
addq _raddr,_rid,_raddr
#endif
// .macro mchk$TLEPstore rlog, rs, rs1, nodebase, tlepreg, clr, tlsb, crd
// .iif eq tlsb, lda 'rs1',<tlep$'tlepreg'_offset>(r31)
// .iif ne tlsb, lda 'rs1',<tlsb$'tlepreg'_offset>(r31)
// or 'rs1', 'nodebase', 'rs1'
// ldlp 'rs', 0('rs1')
// .iif eq crd, stlp 'rs', mchk$'tlepreg'('rlog') // store in frame
// .iif ne crd, stlp 'rs', mchk$crd_'tlepreg'('rlog') // store in frame
// .iif ne clr, stlp 'rs',0('rs1') // optional write to clear
// .endm
// .macro OSFmchk$TLEPstore tlepreg, clr=0, tlsb=0
// mchk$TLEPstore r14, r8, r4, r13, <tlepreg>, <clr>, <tlsb>, crd=0
// .endm
#define CONCAT(_a,_b) _a ## _b
#define OSFmchk_TLEPstore_1(_rlog,_rs,_rs1,_nodebase,_tlepreg) \
lda _rs1,CONCAT(tlep_,_tlepreg)(zero); \
or _rs1,_nodebase,_rs1; \
ldlp _rs1,0(_rs1); \
stlp _rs,CONCAT(mchk_,_tlepreg)(_rlog)
#define OSFmchk_TLEPstore(_tlepreg) OSFmchk_TLEPstore_1(r14,r8,r4,r13,_tlepreg)
// .macro OSFcrd$TLEPstore tlepreg, clr=0, tlsb=0
// mchk$TLEPstore r14, r10, r1, r0, <tlepreg>, <clr>, <tlsb>, crd=1
// .endm
#define OSFcrd_TLEPstore_1(_rlog,_rs,_rs1,_nodebase,_tlepreg) \
lda _rs1,CONCAT(tlep_,_tlepreg)(zero); \
or _rs1,_nodebase,_rs1; \
ldlp _rs1,0(_rs1); \
stlp _rs,CONCAT(mchk_crd_,_tlepreg)(_rlog)
#define OSFcrd_TLEPstore_tlsb_1(_rlog,_rs,_rs1,_nodebase,_tlepreg) \
lda _rs1,CONCAT(tlsb_,_tlepreg)(zero); \
or _rs1,_nodebase,_rs1; \
ldlp _rs1,0(_rs1); \
stlp _rs,CONCAT(mchk_crd_,_tlepreg)(_rlog)
#define OSFcrd_TLEPstore_tlsb_clr_1(_rlog,_rs,_rs1,_nodebase,_tlepreg) \
lda _rs1,CONCAT(tlsb_,_tlepreg)(zero); \
or _rs1,_nodebase,_rs1; \
ldlp _rs1,0(_rs1); \
stlp _rs,CONCAT(mchk_crd_,_tlepreg)(_rlog); \
stlp _rs,0(_rs1)
#define OSFcrd_TLEPstore(_tlepreg) OSFcrd_TLEPstore_1(r14,r8,r4,r13,_tlepreg)
#define OSFcrd_TLEPstore_tlsb(_tlepreg) OSFcrd_TLEPstore_tlsb_1(r14,r8,r4,r13,_tlepreg)
#define OSFcrd_TLEPstore_tlsb_clr(_tlepreg) OSFcrd_TLEPstore_tlsb_clr_1(r14,r8,r4,r13,_tlepreg)
// .macro save_pcia_intr irq
// and r13, #^xf, r25 // isolate low 4 bits
// addq r14, #4, r14 // format the TIOP Node id field
// sll r14, #4, r14 // shift the TIOP Node id
// or r14, r25, r10 // merge Node id/hose/HPC
// mfpr r14, pt14 // get saved value
// extbl r14, #'irq', r25 // confirm none outstanding
// bne r25, sys$machine_check_while_in_pal
// insbl r10, #'irq', r10 // align new info
// or r14, r10, r14 // merge info
// mtpr r14, pt14 // save it
// bic r13, #^xf, r13 // clear low 4 bits of vector
// .endm
#define save_pcia_intr(_irq) \
and r13, 0xf, r25; \
addq r14, 4, r14; \
sll r14, 4, r14; \
or r14, r25, r10; \
mfpr r14, pt14; \
extbl r14, _irq, r25; \
bne r25, sys_machine_check_while_in_pal; \
insbl r10, _irq, r10; \
or r14, r10, r14; \
mtpr r14, pt14; \
bic r13, 0xf, r13
ALIGN_BLOCK
// .sbttl "wripir - PALcode for wripir instruction"
//orig SYS$WRIPIR: // R16 has the processor number.
EXPORT(sys_wripir)
//++
// Convert the processor number to a CPU mask
//--
and r16,0x3, r14 // mask the top stuff (4 CPUs supported)
bis r31,0x1,r16 // get a one
sll r16,r14,r14 // shift the bit to the right place
sll r14,12,r14
//++
// Build the Broadcast Space base address
//--
lda r16,0xf01(r31)
sll r16,32,r16
ldah r13,0xa0(r31)
sll r13,8,r13
bis r16,r13,r16
lda r16,0x0080(r16)
//++
// Send out the IP Intr
//--
stqp r14, 0(r16) // Tsunami MISC Register
wmb // Push out the store
hw_rei
ALIGN_BLOCK
// .sbttl "CFLUSH- PALcode for CFLUSH instruction"
//+
// SYS$CFLUSH
// Entry:
//
// R16 - contains the PFN of the page to be flushed
//
// Function:
// Flush all Dstream caches of 1 entire page
//
//-
EXPORT(sys_cflush)
// #convert pfn to addr, and clean off <63:20>
// #sll r16, <page_offset_size_bits>+<63-20>>, r12
sll r16, page_offset_size_bits+(63-20),r12
// #ldah r13,<<1@22>+32768>@-16(r31)// + xxx<31:16>
// # stolen from srcmax code. XXX bugnion
lda r13, 0x10(r31) // assume 16Mbytes of cache
sll r13, 20, r13 // convert to bytes
srl r12, 63-20, r12 // shift back to normal position
xor r12, r13, r12 // xor addr<18>
or r31, 8192/(32*8), r13 // get count of loads
nop
cflush_loop:
subq r13, 1, r13 // decr counter
mfpr r25, ev5__intid // Fetch level of interruptor
ldqp r31, 32*0(r12) // do a load
ldqp r31, 32*1(r12) // do next load
ldqp r31, 32*2(r12) // do next load
ldqp r31, 32*3(r12) // do next load
ldqp r31, 32*4(r12) // do next load
ldqp r31, 32*5(r12) // do next load
ldqp r31, 32*6(r12) // do next load
ldqp r31, 32*7(r12) // do next load
mfpr r14, ev5__ipl // Fetch current level
lda r12, (32*8)(r12) // skip to next cache block addr
cmple r25, r14, r25 // R25 = 1 if intid .less than or eql ipl
beq r25, 1f // if any int's pending, re-queue CFLUSH -- need to check for hlt interrupt???
bne r13, cflush_loop // loop till done
hw_rei // back to user
ALIGN_BRANCH
1: // Here if interrupted
mfpr r12, exc_addr
subq r12, 4, r12 // Backup PC to point to CFLUSH
mtpr r12, exc_addr
nop
mfpr r31, pt0 // Pad exc_addr write
hw_rei
ALIGN_BLOCK
// .sbttl "CSERVE- PALcode for CSERVE instruction"
//+
// SYS$CSERVE
//
// Function:
// Various functions for private use of console software
//
// option selector in r0
// arguments in r16....
//
//
// r0 = 0 unknown
//
// r0 = 1 ldqp
// r0 = 2 stqp
// args, are as for normal STQP/LDQP in VMS PAL
//
// r0 = 3 dump_tb's
// r16 = detination PA to dump tb's to.
//
// r0<0> = 1, success
// r0<0> = 0, failure, or option not supported
// r0<63:1> = (generally 0, but may be function dependent)
// r0 - load data on ldqp
//
//-
EXPORT(sys_cserve)
#ifdef SIMOS
/* taken from scrmax */
cmpeq r18, CSERVE_K_RD_IMPURE, r0
bne r0, Sys_Cserve_Rd_Impure
cmpeq r18, CSERVE_K_JTOPAL, r0
bne r0, Sys_Cserve_Jtopal
call_pal 0
or r31, r31, r0
hw_rei // and back we go
Sys_Cserve_Rd_Impure:
mfpr r0, pt_impure // Get base of impure scratch area.
hw_rei
ALIGN_BRANCH
Sys_Cserve_Jtopal:
bic a0, 3, t8 // Clear out low 2 bits of address
bis t8, 1, t8 // Or in PAL mode bit
mtpr t8,exc_addr
hw_rei
#else /* SIMOS */
cmpeq r16, cserve_ldlp, r12 // check for ldqp
bne r12, 1f // br if
cmpeq r16, cserve_stlp, r12 // check for stqp
bne r12, 2f // br if
cmpeq r16, cserve_callback, r12 // check for callback entry
bne r12, csrv_callback // br if
cmpeq r16, cserve_identify, r12 // check for callback entry
bne r12, csrv_identify // br if
or r31, r31, r0 // set failure
nop // pad palshadow write
hw_rei // and back we go
#endif /* SIMOS */
// ldqp
ALIGN_QUAD
1:
ldqp r0,0(r17) // get the data
nop // pad palshadow write
hw_rei // and back we go
// stqp
ALIGN_QUAD
2:
stqp r18, 0(r17) // store the data
#ifdef SIMOS
lda r0,17(r31) // bogus
#else
lda r0, CSERVE_SUCCESS(r31) // set success
#endif
hw_rei // and back we go
ALIGN_QUAD
csrv_callback:
ldq r16, 0(r17) // restore r16
ldq r17, 8(r17) // restore r17
lda r0, hlt_c_callback(r31)
br r31, sys_enter_console
csrv_identify:
mfpr r0, pal_base
ldqp r0, 8(r0)
hw_rei
// dump tb's
ALIGN_QUAD
0:
// DTB PTEs - 64 entries
addq r31, 64, r0 // initialize loop counter
nop
1: mfpr r12, ev5__dtb_pte_temp // read out next pte to temp
mfpr r12, ev5__dtb_pte // read out next pte to reg file
subq r0, 1, r0 // decrement loop counter
nop // Pad - no Mbox instr in cycle after mfpr
stqp r12, 0(r16) // store out PTE
addq r16, 8 ,r16 // increment pointer
bne r0, 1b
ALIGN_BRANCH
// ITB PTEs - 48 entries
addq r31, 48, r0 // initialize loop counter
nop
2: mfpr r12, ev5__itb_pte_temp // read out next pte to temp
mfpr r12, ev5__itb_pte // read out next pte to reg file
subq r0, 1, r0 // decrement loop counter
nop //
stqp r12, 0(r16) // store out PTE
addq r16, 8 ,r16 // increment pointer
bne r0, 2b
or r31, 1, r0 // set success
hw_rei // and back we go
// .sbttl "SYS$INTERRUPT - Interrupt processing code"
//+
// SYS$INTERRUPT
//
// Current state:
// Stack is pushed
// ps, sp and gp are updated
// r12, r14 - available
// r13 - INTID (new EV5 IPL)
// r25 - ISR
// r16, r17, r18 - available
//
//-
EXPORT(sys_interrupt)
cmpeq r13, 31, r12
bne r12, sys_int_mchk_or_crd // Check for level 31 interrupt (machine check or crd)
cmpeq r13, 30, r12
bne r12, sys_int_powerfail // Check for level 30 interrupt (powerfail)
cmpeq r13, 29, r12
bne r12, sys_int_perf_cnt // Check for level 29 interrupt (performance counters)
cmpeq r13, 23, r12
bne r12, sys_int_23 // Check for level 23 interrupt
// IPI in Tsunami
cmpeq r13, 22, r12
bne r12, sys_int_22 // Check for level 22 interrupt
// timer interrupt
cmpeq r13, 21, r12
bne r12, sys_int_21 // Check for level 21 interrupt
// I/O
cmpeq r13, 20, r12
bne r12, sys_int_20 // Check for level 20 interrupt (might be corrected
// system error interrupt)
mfpr r14, exc_addr // ooops, something is wrong
br r31, pal_pal_bug_check_from_int
//+
//sys$int_2*
// Routines to handle device interrupts at IPL 23-20.
// System specific method to ack/clear the interrupt, detect passive release,
// detect interprocessor (22), interval clock (22), corrected
// system error (20)
//
// Current state:
// Stack is pushed
// ps, sp and gp are updated
// r12, r14 - available
// r13 - INTID (new EV5 IPL)
// r25 - ISR
//
// On exit:
// Interrupt has been ack'd/cleared
// a0/r16 - signals IO device interrupt
// a1/r17 - contains interrupt vector
// exit to ent_int address
//
//-
ALIGN_BRANCH
sys_int_23:
or r31,0,r16 // IPI interrupt A0 = 0
lda r12,0xf01(r31) // build up an address for the MISC register
sll r12,16,r12
lda r12,0xa000(r12)
sll r12,16,r12
lda r12,0x080(r12)
ldq_p r10,0(r12) // read misc register
and r10,0x3,r10 // isolate CPUID
or r31,0x1,r14 // load r14 with bit to clear
sll r14,r10,r14 // left shift by CPU ID
sll r14,8,r14
stq_p r14, 0(r12) // clear the rtc interrupt
br r31, pal_post_interrupt // Notify the OS
ALIGN_BRANCH
sys_int_22:
or r31,1,r16 // a0 means it is a clock interrupt
lda r12,0xf01(r31) // build up an address for the MISC register
sll r12,16,r12
lda r12,0xa000(r12)
sll r12,16,r12
lda r12,0x080(r12)
ldq_p r10,0(r12) // read misc register
and r10,0x3,r10 // isolate CPUID
or r31,0x10,r14 // load r14 with bit to clear
sll r14,r10,r14 // left shift by CPU ID
stq_p r14, 0(r12) // clear the rtc interrupt
br r31, pal_post_interrupt // Tell the OS
ALIGN_BRANCH
sys_int_20:
Read_TLINTRSUMx(r13,r10,r14) // read the right TLINTRSUMx
srl r13, 12, r13 // shift down to examine IPL15
Intr_Find_TIOP(r13,r14)
beq r14, 1f
Get_TLSB_Node_Address(r14,r10)
lda r10, 0xa40(r10) // Get base TLILID address
ldlp r13, 0(r10) // Read the TLILID register
#if turbo_pcia_intr_fix == 0
//orig .if eq turbo_pcia_intr_fix
bne r13, pal_post_dev_interrupt
//orig .iff
beq r13, 1f
and r13, 0x3, r10 // check for PCIA bits
beq r10, pal_post_dev_interrupt // done if nothing set
save_pcia_intr(1)
br r31, pal_post_dev_interrupt //
// orig .endc
#endif /* turbo_pcia_intr_fix == 0 */
1: lda r16, osfint_c_passrel(r31) // passive release
br r31, pal_post_interrupt //
ALIGN_BRANCH
sys_int_21:
lda r12,0xf01(r31)
sll r12,32,r12
ldah r13,0xa0(r31)
sll r13,8,r13
bis r12,r13,r12
lda r12,0x0080(r12)
ldqp r13, 0(r12) // read the MISC register for CPUID
and r13,0x1,r14 // grab LSB and shift left 6
sll r14,6,r14
and r13,0x2,r10 // grabl LSB+1 and shift left 9
sll r10,9,r10
mskbl r12,0,r12 // calculate DIRn address
lda r13,0x280(r31)
bis r12,r13,r12
or r12,r14,r12
or r12,r10,r12
ldqp r13, 0(r12) // read DIRn
or r31,1,r14 // set bit 55 (ISA Interrupt)
sll r14,55,r14
and r13, r14, r14 // check if bit 55 is set
lda r16,0x900(r31) // load offset for normal into r13
beq r14, normal_int // if not compute the vector normally
lda r16,0x800(r31) // replace with offset for pic
lda r12,0xf01(r31) // build an addr to access PIC
sll r12,32,r12 // at f01fc000000
ldah r13,0xfc(r31)
sll r13,8,r13
bis r12,r13,r12
ldqp r13,0x0020(r12) // read PIC1 ISR for interrupting dev
normal_int:
//ctlz r13,r14 // count the number of leading zeros
// EV5 doesn't have ctlz, but we do, so lets use it
.byte 0x4e
.byte 0x06
.byte 0xed
.byte 0x73
lda r10,63(r31)
subq r10,r14,r17 // subtract from
lda r13,0x10(r31)
mulq r17,r13,r17 // compute 0x900 + (0x10 * Highest DIRn-bit)
addq r17,r16,r17
or r31,3,r16 // a0 means it is a I/O interrupt
br r31, pal_post_interrupt
ALIGN_BRANCH
pal_post_dev_interrupt:
or r13, r31, r17 // move vector to a1
or r31, osfint_c_dev, r16 // a0 signals IO device interrupt
pal_post_interrupt:
mfpr r12, pt_entint
mtpr r12, exc_addr
nop
nop
hw_rei_spe
//+
// sys_passive_release
// Just pretend the interrupt never occurred.
//-
EXPORT(sys_passive_release)
mtpr r11, ev5__dtb_cm // Restore Mbox current mode for ps
nop
mfpr r31, pt0 // Pad write to dtb_cm
hw_rei
//+
//sys_int_powerfail
// A powerfail interrupt has been detected. The stack has been pushed.
// IPL and PS are updated as well.
//
// I'm not sure what to do here, I'm treating it as an IO device interrupt
//
//-
ALIGN_BLOCK
sys_int_powerfail:
lda r12, 0xffc4(r31) // get GBUS_MISCR address bits
sll r12, 24, r12 // shift to proper position
ldqp r12, 0(r12) // read GBUS_MISCR
srl r12, 5, r12 // isolate bit <5>
blbc r12, 1f // if clear, no missed mchk
// Missed a CFAIL mchk
lda r13, 0xffc7(r31) // get GBUS$SERNUM address bits
sll r13, 24, r13 // shift to proper position
lda r14, 0x40(r31) // get bit <6> mask
ldqp r12, 0(r13) // read GBUS$SERNUM
or r12, r14, r14 // set bit <6>
stqp r14, 0(r13) // clear GBUS$SERNUM<6>
mb
mb
1: br r31, sys_int_mchk // do a machine check
lda r17, scb_v_pwrfail(r31) // a1 to interrupt vector
mfpr r25, pt_entint
lda r16, osfint_c_dev(r31) // a0 to device code
mtpr r25, exc_addr
nop // pad exc_addr write
nop
hw_rei_spe
//+
// sys$halt_interrupt
// A halt interrupt has been detected. Pass control to the console.
//
//
//-
EXPORT(sys_halt_interrupt)
ldah r13, 0x1800(r31) // load Halt/^PHalt bits
Write_TLINTRSUMx(r13,r10,r14) // clear the ^PHalt bits
mtpr r11, dtb_cm // Restore Mbox current mode
nop
nop
mtpr r0, pt0
#ifndef SIMOS
pvc_jsr updpcb, bsr=1
bsr r0, pal_update_pcb // update the pcb
#endif
lda r0, hlt_c_hw_halt(r31) // set halt code to hw halt
br r31, sys_enter_console // enter the console
//+
// sys$int_mchk_or_crd
//
// Current state:
// Stack is pushed
// ps, sp and gp are updated
// r12
// r13 - INTID (new EV5 IPL)
// r14 - exc_addr
// r25 - ISR
// r16, r17, r18 - available
//
//-
ALIGN_BLOCK
sys_int_mchk_or_crd:
srl r25, isr_v_mck, r12
blbs r12, sys_int_mchk
//+
// Not a Machine check interrupt, so must be an Internal CRD interrupt
//-
mb //Clear out Cbox prior to reading IPRs
srl r25, isr_v_crd, r13 //Check for CRD
blbc r13, pal_pal_bug_check_from_int //If CRD not set, shouldn't be here!!!
lda r9, 1(r31)
sll r9, hwint_clr_v_crdc, r9 // get ack bit for crd
mtpr r9, ev5__hwint_clr // ack the crd interrupt
or r31, r31, r12 // clear flag
lda r9, mchk_c_ecc_c(r31) // Correctable error MCHK code
sys_merge_sys_corr:
ldah r14, 0xfff0(r31)
mtpr r0, pt0 // save r0 for scratch
zap r14, 0xE0, r14 // Get Cbox IPR base
mtpr r1, pt1 // save r0 for scratch
ldqp r0, ei_addr(r14) // EI_ADDR IPR
ldqp r10, fill_syn(r14) // FILL_SYN IPR
bis r0, r10, r31 // Touch lds to make sure they complete before doing scrub
blbs r12, 1f // no scrubbing for IRQ0 case
// XXX bugnion pvc_jsr crd_scrub_mem, bsr=1
bsr r13, sys_crd_scrub_mem // and go scrub
// ld/st pair in scrub routine will have finished due
// to ibox stall of stx_c. Don't need another mb.
ldqp r8, ei_stat(r14) // EI_STAT, unlock EI_ADDR, BC_TAG_ADDR, FILL_SYN
or r8, r31, r12 // Must only be executed once in this flow, and must
br r31, 2f // be after the scrub routine.
1: ldqp r8, ei_stat(r14) // EI_STAT, unlock EI_ADDR, BC_TAG_ADDR, FILL_SYN
// For IRQ0 CRD case only - meaningless data.
2: mfpr r13, pt_mces // Get MCES
srl r12, ei_stat_v_ei_es, r14 // Isolate EI_STAT:EI_ES
blbc r14, 6f // branch if 630
srl r13, mces_v_dsc, r14 // check if 620 reporting disabled
blbc r14, 5f // branch if enabled
or r13, r31, r14 // don't set SCE if disabled
br r31, 8f // continue
5: bis r13, BIT(mces_v_sce), r14 // Set MCES<SCE> bit
br r31, 8f
6: srl r13, mces_v_dpc, r14 // check if 630 reporting disabled
blbc r14, 7f // branch if enabled
or r13, r31, r14 // don't set PCE if disabled
br r31, 8f // continue
7: bis r13, BIT(mces_v_pce), r14 // Set MCES<PCE> bit
// Setup SCB if dpc is not set
8: mtpr r14, pt_mces // Store updated MCES
srl r13, mces_v_sce, r1 // Get SCE
srl r13, mces_v_pce, r14 // Get PCE
or r1, r14, r1 // SCE OR PCE, since they share
// the CRD logout frame
// Get base of the logout area.
GET_IMPURE(r14) // addr of per-cpu impure area
GET_ADDR(r14,(pal_logout_area+mchk_crd_base),r14)
blbc r1, sys_crd_write_logout_frame // If pce/sce not set, build the frame
// Set the 2nd error flag in the logout area:
lda r1, 3(r31) // Set retry and 2nd error flags
sll r1, 30, r1 // Move to bits 31:30 of logout frame flag longword
stlp r1, mchk_crd_flag+4(r14) // store flag longword
br sys_crd_ack
sys_crd_write_logout_frame:
// should only be here if neither the pce or sce bits are set
//+
// Write the mchk code to the logout area
//-
stqp r9, mchk_crd_mchk_code(r14)
//+
// Write the first 2 quadwords of the logout area:
//-
lda r1, 1(r31) // Set retry flag
sll r1, 63, r9 // Move retry flag to bit 63
lda r1, mchk_crd_size(r9) // Combine retry flag and frame size
stqp r1, mchk_crd_flag(r14) // store flag/frame size
#ifndef SIMOS
/* needed? bugnion */
lda r1, mchk_crd_sys_base(r31) // sys offset
sll r1, 32, r1
lda r1, mchk_crd_cpu_base(r1) // cpu offset
stqp r1, mchk_crd_offsets(r14) // store sys offset/cpu offset into logout frame
#endif
//+
// Write error IPRs already fetched to the logout area
//-
stqp r0, mchk_crd_ei_addr(r14)
stqp r10, mchk_crd_fill_syn(r14)
stqp r8, mchk_crd_ei_stat(r14)
stqp r25, mchk_crd_isr(r14)
//+
// Log system specific info here
//-
crd_storeTLEP_:
lda r1, 0xffc4(r31) // Get GBUS$MISCR address
sll r1, 24, r1
ldqp r1, 0(r1) // Read GBUS$MISCR
sll r1, 16, r1 // shift up to proper field
mfpr r10, pt_whami // get our node id
extbl r10, 1, r10 // shift to bit 0
or r1, r10, r1 // merge MISCR and WHAMI
stlp r1, mchk_crd_whami(r14) // write to crd logout area
srl r10, 1, r10 // shift off cpu number
Get_TLSB_Node_Address(r10,r0) // compute our nodespace address
OSFcrd_TLEPstore_tlsb(tldev)
OSFcrd_TLEPstore_tlsb_clr(tlber)
OSFcrd_TLEPstore_tlsb_clr(tlesr0)
OSFcrd_TLEPstore_tlsb_clr(tlesr1)
OSFcrd_TLEPstore_tlsb_clr(tlesr2)
OSFcrd_TLEPstore_tlsb_clr(tlesr3)
sys_crd_ack:
mfpr r0, pt0 // restore r0
mfpr r1, pt1 // restore r1
srl r12, ei_stat_v_ei_es, r12
blbc r12, 5f
srl r13, mces_v_dsc, r10 // logging enabled?
br r31, 6f
5: srl r13, mces_v_dpc, r10 // logging enabled?
6: blbc r10, sys_crd_post_interrupt // logging enabled -- report it
// logging not enabled --
// Get base of the logout area.
GET_IMPURE(r13) // addr of per-cpu impure area
GET_ADDR(r13,(pal_logout_area+mchk_crd_base),r13)
ldlp r10, mchk_crd_rsvd(r13) // bump counter
addl r10, 1, r10
stlp r10, mchk_crd_rsvd(r13)
mb
br r31, sys_crd_dismiss_interrupt // just return
//+
// The stack is pushed. Load up a0,a1,a2 and vector via entInt
//
//-
ALIGN_BRANCH
sys_crd_post_interrupt:
lda r16, osfint_c_mchk(r31) // flag as mchk/crd in a0
lda r17, scb_v_proc_corr_err(r31) // a1 <- interrupt vector
blbc r12, 1f
lda r17, scb_v_sys_corr_err(r31) // a1 <- interrupt vector
1: subq r31, 1, r18 // get a -1
mfpr r25, pt_entInt
srl r18, 42, r18 // shift off low bits of kseg addr
mtpr r25, exc_addr // load interrupt vector
sll r18, 42, r18 // shift back into position
or r14, r18, r18 // EV4 algorithm - pass pointer to mchk frame as kseg address
hw_rei_spe // done
//+
// The stack is pushed. Need to back out of it all.
//-
sys_crd_dismiss_interrupt:
br r31, Call_Pal_Rti
// .sbttl sys_crd_scrub_mem
//+
//
// sys_crd_scrub_mem
// called
// jsr r13, sys$crd_scrub_mem
// r0 = addr of cache block
//
//-
ALIGN_BLOCK // align for branch target
sys_crd_scrub_mem:
// now find error in memory, and attempt to scrub that cache block
// This routine just scrubs the failing octaword
// Only need to "touch" one quadword per octaword to accomplish the scrub
srl r0, 39, r8 // get high bit of bad pa
blbs r8, 1f // don't attempt fixup on IO space addrs
nop // needed to align the ldqpl to octaword boundary
nop // "
ldqpl r8, 0(r0) // attempt to read the bad memory
// location
// (Note bits 63:40,3:0 of ei_addr
// are set to 1, but as long as
// we are doing a phys ref, should
// be ok)
nop // Needed to keep the Ibox from swapping the ldqpl into E1
stqpc r8, 0(r0) // Store it back if it is still there.
// If store fails, location already
// scrubbed by someone else
nop // needed to align the ldqpl to octaword boundary
lda r8, 0x20(r31) // flip bit 5 to touch next hexaword
xor r8, r0, r0
nop // needed to align the ldqpl to octaword boundary
nop // "
ldqpl r8, 0(r0) // attempt to read the bad memory
// location
// (Note bits 63:40,3:0 of ei_addr
// are set to 1, but as long as
// we are doing a phys ref, should
// be ok)
nop // Needed to keep the Ibox from swapping the ldqpl into E1
stqpc r8, 0(r0) // Store it back if it is still there.
// If store fails, location already
// scrubbed by someone else
lda r8, 0x20(r31) // restore r0 to original address
xor r8, r0, r0
//at this point, ei_stat could be locked due to a new corr error on the ld,
//so read ei_stat to unlock AFTER this routine.
// XXX bugnion pvc$jsr crd_scrub_mem, bsr=1, dest=1
1: ret r31, (r13) // and back we go
// .sbttl "SYS$INT_MCHK - MCHK Interrupt code"
//+
// Machine check interrupt from the system. Setup and join the
// regular machine check flow.
// On exit:
// pt0 - saved r0
// pt1 - saved r1
// pt4 - saved r4
// pt5 - saved r5
// pt6 - saved r6
// pt10 - saved exc_addr
// pt_misc<47:32> - mchk code
// pt_misc<31:16> - scb vector
// r14 - base of Cbox IPRs in IO space
// MCES<mchk> is set
//-
ALIGN_BLOCK
sys_int_mchk:
lda r14, mchk_c_sys_hrd_error(r31)
mfpr r12, exc_addr
addq r14, 1, r14 // Flag as interrupt
nop
sll r14, 32, r14 // Move mchk code to position
mtpr r12, pt10 // Stash exc_addr
mfpr r12, pt_misc // Get MCES and scratch
mtpr r0, pt0 // Stash for scratch
zap r12, 0x3c, r12 // Clear scratch
blbs r12, sys_double_machine_check // MCHK halt if double machine check
or r12, r14, r12 // Combine mchk code
lda r14, scb_v_sysmchk(r31) // Get SCB vector
sll r14, 16, r14 // Move SCBv to position
or r12, r14, r14 // Combine SCBv
bis r14, BIT(mces_v_mchk), r14 // Set MCES<MCHK> bit
mtpr r14, pt_misc // Save mchk code!scbv!whami!mces
ldah r14, 0xfff0(r31)
mtpr r1, pt1 // Stash for scratch
zap r14, 0xE0, r14 // Get Cbox IPR base
mtpr r4, pt4
mtpr r5, pt5
#if beh_model
// .if ne beh_model
ldah r25, 0xC000(r31) // Get base of demon space
lda r25, 0x340(r25) // Add interrupt demon offset
ldqp r13, 0(r25) // Read the control register
nop
and r13, 0x10, r8 // For debug, check that the interrupt is expected
beq r8, interrupt_not_expected
bic r13, 0x10, r13
stqp r13, 0(r25) // Ack and clear the interrupt
// XXX bugnion pvc$violate 379 // stqp can't trap except replay. mt ipr only problem if mf same ipr in same shadow
.endc
#endif
mtpr r6, pt6
br r31, sys_mchk_collect_iprs // Join common machine check flow
// .sbttl "SYS$INT_PERF_CNT - Performance counter interrupt code"
//+
//sys$int_perf_cnt
//
// A performance counter interrupt has been detected. The stack has been pushed.
// IPL and PS are updated as well.
//
// on exit to interrupt entry point ENTINT::
// a0 = osfint$c_perf
// a1 = scb$v_perfmon (650)
// a2 = 0 if performance counter 0 fired
// a2 = 1 if performance counter 1 fired
// a2 = 2 if performance counter 2 fired
// (if more than one counter overflowed, an interrupt will be
// generated for each counter that overflows)
//
//
//-
ALIGN_BLOCK
sys_int_perf_cnt: // Performance counter interrupt
lda r17, scb_v_perfmon(r31) // a1 to interrupt vector
mfpr r25, pt_entint
lda r16, osfint_c_perf(r31) // a0 to perf counter code
mtpr r25, exc_addr
//isolate which perf ctr fired, load code in a2, and ack
mfpr r25, isr
or r31, r31, r18 // assume interrupt was pc0
srl r25, isr_v_pc1, r25 // isolate
cmovlbs r25, 1, r18 // if pc1 set, load 1 into r14
srl r25, 1, r25 // get pc2
cmovlbs r25, 2, r18 // if pc2 set, load 2 into r14
lda r25, 1(r31) // get a one
sll r25, r18, r25
sll r25, hwint_clr_v_pc0c, r25 // ack only the perf counter that generated the interrupt
mtpr r25, hwint_clr
hw_rei_spe
ALIGN_BLOCK
// .sbttl "System specific RESET code"
//+
// RESET code
// On entry:
// r1 = pal_base +8
//
// Entry state on trap:
// r0 = whami
// r2 = base of scratch area
// r3 = halt code
// and the following 3 if init_cbox is enabled:
// r5 = sc_ctl
// r6 = bc_ctl
// r7 = bc_cnfg
//
// Entry state on switch:
// r17 - new PC
// r18 - new PCBB
// r19 - new VPTB
//
//-
#if rax_mode==0
.globl sys_reset
sys_reset:
// mtpr r31, ic_flush_ctl // do not flush the icache - done by hardware before SROM load
mtpr r31, itb_ia // clear the ITB
mtpr r31, dtb_ia // clear the DTB
lda r1, -8(r1) // point to start of code
mtpr r1, pal_base // initialize PAL_BASE
// Interrupts
mtpr r31, astrr // stop ASTs
mtpr r31, aster // stop ASTs
mtpr r31, sirr // clear software interrupts
mtpr r0, pt1 // r0 is whami (unless we entered via swp)
//orig ldah r1, <<1@<icsr$v_sde-16>> ! <1@<icsr$v_fpe-16>> ! <2@<icsr$v_spe-16>>>(r31)
ldah r1,(BIT(icsr_v_sde-16)|BIT(icsr_v_fpe-16)|BIT(icsr_v_spe-16+1))(zero)
#if disable_crd == 0
// .if eq disable_crd
bis r31, 1, r0
sll r0, icsr_v_crde, r0 // A 1 in iscr<corr_read_enable>
or r0, r1, r1 // Set the bit
#endif
mtpr r1, icsr // ICSR - Shadows enabled, Floating point enable,
// super page enabled, correct read per assembly option
// Mbox/Dcache init
//orig lda r1, <1@<mcsr$v_sp1>>(r31)
lda r1,BIT(mcsr_v_sp1)(zero)
mtpr r1, mcsr // MCSR - Super page enabled
lda r1, BIT(dc_mode_v_dc_ena)(r31)
ALIGN_BRANCH
// mtpr r1, dc_mode // turn Dcache on
nop
mfpr r31, pt0 // No Mbox instr in 1,2,3,4
mfpr r31, pt0
mfpr r31, pt0
mfpr r31, pt0
mtpr r31, dc_flush // flush Dcache
// build PS (IPL=7,CM=K,VMM=0,SW=0)
lda r11, 0x7(r31) // Set shadow copy of PS - kern mode, IPL=7
lda r1, 0x1F(r31)
mtpr r1, ipl // set internal <ipl>=1F
mtpr r31, ev5__ps // set new ps<cm>=0, Ibox copy
mtpr r31, dtb_cm // set new ps<cm>=0, Mbox copy
// Create the PALtemp pt_intmask -
// MAP:
// OSF IPL EV5 internal IPL(hex) note
// 0 0
// 1 1
// 2 2
// 3 14 device
// 4 15 device
// 5 16 device
// 6 1E device,performance counter, powerfail
// 7 1F
//
ldah r1, 0x1f1E(r31) // Create upper lw of int_mask
lda r1, 0x1615(r1)
sll r1, 32, r1
ldah r1, 0x1402(r1) // Create lower lw of int_mask
lda r1, 0x0100(r1)
mtpr r1, pt_intmask // Stash in PALtemp
// Unlock a bunch of chip internal IPRs
mtpr r31, exc_sum // clear out exeception summary and exc_mask
mfpr r31, va // unlock va, mmstat
//rig lda r8, <<1@icperr_stat$v_dpe> ! <1@icperr_stat$v_tpe> ! <1@icperr_stat$v_tmr>>(r31)
lda r8,(BIT(icperr_stat_v_dpe)|BIT(icperr_stat_v_tpe)|BIT(icperr_stat_v_tmr))(zero)
mtpr r8, icperr_stat // Clear Icache parity error & timeout status
//orig lda r8, <<1@dcperr_stat$v_lock> ! <1@dcperr_stat$v_seo>>(r31)
lda r8,(BIT(dcperr_stat_v_lock)|BIT(dcperr_stat_v_seo))(r31)
mtpr r8, dcperr_stat // Clear Dcache parity error status
rc r0 // clear intr_flag
mtpr r31, pt_trap
mfpr r0, pt_misc
srl r0, pt_misc_v_switch, r1
blbs r1, sys_reset_switch // see if we got here from swppal
// Rest of the "real" reset flow
// ASN
mtpr r31, dtb_asn
mtpr r31, itb_asn
lda r1, 0x67(r31)
sll r1, hwint_clr_v_pc0c, r1
mtpr r1, hwint_clr // Clear hardware interrupt requests
lda r1, BIT(mces_v_dpc)(r31) // 1 in disable processor correctable error
mfpr r0, pt1 // get whami
insbl r0, 1, r0 // isolate whami in correct pt_misc position
or r0, r1, r1 // combine whami and mces
mtpr r1, pt_misc // store whami and mces, swap bit clear
zapnot r3, 1, r0 // isolate halt code
mtpr r0, pt0 // save entry type
// Cycle counter
or r31, 1, r9 // get a one
sll r9, 32, r9 // shift to <32>
mtpr r31, cc // clear Cycle Counter
mtpr r9, cc_ctl // clear and enable the Cycle Counter
mtpr r31, pt_scc // clear System Cycle Counter
// Misc PALtemps
mtpr r31, maf_mode // no mbox instructions for 3 cycles
or r31, 1, r1 // get bogus scbb value
mtpr r1, pt_scbb // load scbb
mtpr r31, pt_prbr // clear out prbr
#ifdef SIMOS
// yes, this is ugly, but you figure out a better
// way to get the address of the kludge_initial_pcbb
// in r1 with an uncooperative assembler --ali
br r1, kludge_getpcb_addr
br r31, kludge_initial_pcbb
kludge_getpcb_addr:
ldqp r19, 0(r1)
sll r19, 44, r19
srl r19, 44, r19
mulq r19,4,r19
addq r19, r1, r1
addq r1,4,r1
// or zero,kludge_initial_pcbb,r1
// GET_ADDR(r1, (kludge_initial_pcbb-pal_base), r1)
#else
mfpr r1, pal_base
//orig sget_addr r1, (kludge_initial_pcbb-pal$base), r1, verify=0// get address for temp pcbb
GET_ADDR(r1, (kludge_initial_pcbb-pal_base), r1)
#endif
mtpr r1, pt_pcbb // load pcbb
lda r1, 2(r31) // get a two
sll r1, 32, r1 // gen up upper bits
mtpr r1, mvptbr
mtpr r1, ivptbr
mtpr r31, pt_ptbr
// Performance counters
mtpr r31, pmctr
#if init_cbox != 0
// .if ne init_cbox
// Only init the Scache and the Bcache if there have been no previous
// cacheable dstream loads or stores.
//
// Inputs:
// r5 - sc_ctl
// r6 - bc_ctl
// r7 - bc_cnfg
ldah r0, 0xfff0(r31)
zap r0, 0xE0, r0 // Get Cbox IPR base
ldqp r19, ev5__sc_ctl(r0) // read current sc_ctl
temp = <<<1@bc_ctl$v_ei_dis_err> + <1@bc_ctl$v_ei_ecc_or_parity> + <1@bc_ctl$v_corr_fill_dat>>@-1>
lda r20, temp(r31) // create default bc_ctl (bc disabled, errors disabled, ecc mode)
sll r20, 1, r20
temp = 0x017441 // default bc_config
get_addr r21, temp, r31 // create default bc_config
lda r23, <1@sc_ctl_v_sc_flush>(r31) //set flag to invalidate scache in set_sc_bc_ctl
// XXX bugnion pvc$jsr scbcctl, bsr=1
bsr r10, set_sc_bc_ctl
update_bc_ctl_shadow r6, r23 // update bc_ctl shadow using r6 as input// r23 gets adjusted impure pointer
store_reg1 bc_config, r7, r23, ipr=1 // update bc_config shadow in impure area
// .endc
#endif
// Clear pmctr_ctl in impure area
#ifndef SIMOS
// can't assemble ???
update_pmctr_ctl r31, r1 // clear pmctr_ctl // r1 trashed
#endif
ldah r14, 0xfff0(r31)
zap r14, 0xE0, r14 // Get Cbox IPR base
#ifndef SIMOS
ldqp r31, sc_stat(r14) // Clear sc_stat and sc_addr
ldqp r31, ei_stat(r14)
ldqp r31, ei_stat(r14) // Clear ei_stat, ei_addr, bc_tag_addr, fill_syn
#endif
GET_IMPURE(r13)
stqpc r31, 0(r13) // Clear lock_flag
mfpr r0, pt0 // get entry type
br r31, sys_enter_console // enter the cosole
#endif /* rax_mode == 0 */
//.if ne rax_mode
#if rax_mode != 0
// For RAX:
// r0 - icsr at first, then used for cbox ipr base offset
// r2 - mcsr
// r3 - dc_mode
// r4 - maf_mode
// r5 - sc_ctl
// r6 - bc_ctl
// r7 - bc_cnfg
.globl sys_reset
sys_reset:
mtpr r31, ev5__dtb_cm // set mbox mode to kernel
mtpr r31, ev5__ps // set Ibox mode to kernel - E1
mtpr r0, ev5__icsr // Load ICSR - E1
mtpr r2, ev5__mcsr
mfpr r8, pal_base
ldah r0, 0xfff0(r31)
zap r0, 0xE0, r0 // Get Cbox IPR base
mtpr r31, ev5__itb_asn // clear asn - E1
ldqp r19, ev5__sc_ctl(r0) // read current sc_ctl
temp = <<<1@bc_ctl$v_ei_dis_err> + <1@bc_ctl$v_ei_ecc_or_parity> + <1@bc_ctl$v_corr_fill_dat>>@-1>
lda r20, temp(r31) // create default bc_ctl (bc disabled, errors disabled, ecc mode)
sll r20, 1, r20
temp = 0x017441 // default bc_config
get_addr r21, temp, r31 // create default bc_config
lda r23, <1@sc_ctl_v_sc_flush>(r31) //set flag to invalidate scache in set_sc_bc_ctl
// XXX bugnion pvc$jsr scbcctl, bsr=1
bsr r10, set_sc_bc_ctl
update_bc_ctl_shadow r6, r2 // initialize bc_ctl shadow// adjusted impure pointer in r2
store_reg1 pmctr_ctl, r31, r2, ipr=1 // clear pmctr_ctl
store_reg1 bc_config, r7, r2, ipr=1 // initialize bc_config shadow
mtpr r3, ev5__dc_mode // write dc_mode
mtpr r31, ev5__dc_flush // flush dcache
mtpr r31, ev5__exc_sum // clear exc_sum - E1
mtpr r31, ev5__exc_mask // clear exc_mask - E1
ldah r2, 4(r31) // For EXC_ADDR
mtpr r2, ev5__exc_addr // EXC_ADDR to 40000 (hex)
mtpr r31, ev5__sirr // Clear SW interrupts (for ISP)
mtpr r4, ev5__maf_mode // write maf_mode
mtpr r31, ev5__alt_mode // set alt_mode to kernel
mtpr r31, ev5__itb_ia // clear ITB - E1
lda r1, 0x1F(r31) // For IPL
mtpr r1, ev5__ipl // IPL to 1F
mtpr r31, ev5__hwint_clr // clear hardware interrupts
mtpr r31, ev5__aster // disable AST interrupts
mtpr r31, ev5__astrr // clear AST requests
mtpr r31, ev5__dtb_ia // clear dtb
nop
mtpr r31, pt_trap
srl r2, page_offset_size_bits, r9 // Start to make PTE for address 40000
sll r9, 32, r9
lda r9, 0x7F01(r9) // Make PTE, V set, all RE set, all but UWE set
nop
mtpr r9, dtb_pte // ACORE hack, load TB with 1-1 translation for address 40000
mtpr r2, itb_tag // ACORE hack, load TB with 1-1 translation for address 40000
mtpr r2, dtb_tag
mtpr r9, itb_pte
and r31, r31, r0 // clear deposited registers, note: r2 already overwritten
and r31, r31, r3
and r31, r31, r4
and r31, r31, r5
and r31, r31, r6
and r31, r31, r7
hw_rei //May need to be a rei_stall since
//we write to TB's above
//However, it currently works ok. (JH)
// .endc
#endif /*rax_mode != 0 */
// swppal entry
// r0 - pt_misc
// r17 - new PC
// r18 - new PCBB
// r19 - new VPTB
sys_reset_switch:
or r31, 1, r9
sll r9, pt_misc_v_switch, r9
bic r0, r9, r0 // clear switch bit
mtpr r0, pt_misc
rpcc r1 // get cyccounter
ldqp r22, osfpcb_q_fen(r18) // get new fen/pme
ldlp r23, osfpcb_l_cc(r18) // get cycle counter
ldlp r24, osfpcb_l_asn(r18) // get new asn
ldqp r25, osfpcb_q_Mmptr(r18)// get new mmptr
sll r25, page_offset_size_bits, r25 // convert pfn to pa
mtpr r25, pt_ptbr // load the new mmptr
mtpr r18, pt_pcbb // set new pcbb
bic r17, 3, r17 // clean use pc
mtpr r17, exc_addr // set new pc
mtpr r19, mvptbr
mtpr r19, ivptbr
ldqp r30, osfpcb_q_Usp(r18) // get new usp
mtpr r30, pt_usp // save usp
sll r24, dtb_asn_v_asn, r8
mtpr r8, dtb_asn
sll r24, itb_asn_v_asn, r24
mtpr r24, itb_asn
mfpr r25, icsr // get current icsr
lda r24, 1(r31)
sll r24, icsr_v_fpe, r24 // 1 in icsr<fpe> position
bic r25, r24, r25 // clean out old fpe
and r22, 1, r22 // isolate new fen bit
sll r22, icsr_v_fpe, r22
or r22, r25, r25 // or in new fpe
mtpr r25, icsr // update ibox ipr
subl r23, r1, r1 // gen new cc offset
insll r1, 4, r1 // << 32
mtpr r1, cc // set new offset
or r31, r31, r0 // set success
ldqp r30, osfpcb_q_Ksp(r18) // get new ksp
mfpr r31, pt0 // stall
hw_rei_stall
// .sbttl "SYS_MACHINE_CHECK - Machine check PAL"
ALIGN_BLOCK
//+
//sys$machine_check
// A machine_check trap has occurred. The Icache has been flushed.
//
//-
EXPORT(sys_machine_check)
// Need to fill up the refill buffer (32 instructions) and
// then flush the Icache again.
// Also, due to possible 2nd Cbox register file write for
// uncorrectable errors, no register file read or write for 7 cycles.
nop
mtpr r0, pt0 // Stash for scratch -- OK if Cbox overwrites r0 later
nop
nop
nop
nop
nop
nop
nop
nop
// 10 instructions// 5 cycles
nop
nop
nop
nop
// Register file can now be written
lda r0, scb_v_procmchk(r31) // SCB vector
mfpr r13, pt_mces // Get MCES
sll r0, 16, r0 // Move SCBv to correct position
// bis r13, #<1@mces$v_mchk>, r14 // Set MCES<MCHK> bit
bis r13, BIT(mces_v_mchk), r14 // Set MCES<MCHK> bit
zap r14, 0x3C, r14 // Clear mchk_code word and SCBv word
mtpr r14, pt_mces
// 20 instructions
nop
or r14, r0, r14 // Insert new SCB vector
lda r0, mchk_c_proc_hrd_error(r31) // MCHK code
mfpr r12, exc_addr
sll r0, 32, r0 // Move MCHK code to correct position
mtpr r4, pt4
or r14, r0, r14 // Insert new MCHK code
mtpr r14, pt_misc // Store updated MCES, MCHK code, and SCBv
ldah r14, 0xfff0(r31)
mtpr r1, pt1 // Stash for scratch - 30 instructions
zap r14, 0xE0, r14 // Get Cbox IPR base
mtpr r12, pt10 // Stash exc_addr
mtpr r31, ic_flush_ctl // Second Icache flush, now it is really flushed.
blbs r13, sys_double_machine_check // MCHK halt if double machine check
mtpr r6, pt6
mtpr r5, pt5
// Look for the powerfail cases here....
mfpr r4, isr
srl r4, isr_v_pfl, r4
blbc r4, sys_mchk_collect_iprs // skip if no powerfail interrupt pending
lda r4, 0xffc4(r31) // get GBUS$MISCR address bits
sll r4, 24, r4 // shift to proper position
ldqp r4, 0(r4) // read GBUS$MISCR
srl r4, 5, r4 // isolate bit <5>
blbc r4, sys_mchk_collect_iprs // skip if already cleared
// No missed CFAIL mchk
lda r5, 0xffc7(r31) // get GBUS$SERNUM address bits
sll r5, 24, r5 // shift to proper position
lda r6, 0x40(r31) // get bit <6> mask
ldqp r4, 0(r5) // read GBUS$SERNUM
or r4, r6, r6 // set bit <6>
stqp r6, 0(r5) // clear GBUS$SERNUM<6>
mb
mb
//+
// Start to collect the IPRs. Common entry point for mchk flows.
//
// Current state:
// pt0 - saved r0
// pt1 - saved r1
// pt4 - saved r4
// pt5 - saved r5
// pt6 - saved r6
// pt10 - saved exc_addr
// pt_misc<47:32> - mchk code
// pt_misc<31:16> - scb vector
// r14 - base of Cbox IPRs in IO space
// r0, r1, r4, r5, r6, r12, r13, r25 - available
// r8, r9, r10 - available as all loads are physical
// MCES<mchk> is set
//
//-
EXPORT(sys_mchk_collect_iprs)
mb // MB before reading Scache IPRs
mfpr r1, icperr_stat
mfpr r8, dcperr_stat
mtpr r31, dc_flush // Flush the Dcache
mfpr r31, pt0 // Pad Mbox instructions from dc_flush
mfpr r31, pt0
nop
nop
ldqp r9, sc_addr(r14) // SC_ADDR IPR
bis r9, r31, r31 // Touch ld to make sure it completes before
// read of SC_STAT
ldqp r10, sc_stat(r14) // SC_STAT, also unlocks SC_ADDR
ldqp r12, ei_addr(r14) // EI_ADDR IPR
ldqp r13, bc_tag_addr(r14) // BC_TAG_ADDR IPR
ldqp r0, fill_syn(r14) // FILL_SYN IPR
bis r12, r13, r31 // Touch lds to make sure they complete before reading EI_STAT
bis r0, r0, r31 // Touch lds to make sure they complete before reading EI_STAT
ldqp r25, ei_stat(r14) // EI_STAT, unlock EI_ADDR, BC_TAG_ADDR, FILL_SYN
ldqp r31, ei_stat(r14) // Read again to insure it is unlocked
//+
// Look for nonretryable cases
// In this segment:
// r5<0> = 1 means retryable
// r4, r6, and r14 are available for scratch
//
//-
bis r31, r31, r5 // Clear local retryable flag
srl r25, ei_stat_v_bc_tperr, r25 // Move EI_STAT status bits to low bits
lda r4, 1(r31)
sll r4, icperr_stat_v_tmr, r4
and r1, r4, r4 // Timeout reset
bne r4, sys_cpu_mchk_not_retryable
and r8, BIT(dcperr_stat_v_lock), r4 // DCache parity error locked
bne r4, sys_cpu_mchk_not_retryable
lda r4, 1(r31)
sll r4, sc_stat_v_sc_scnd_err, r4
and r10, r4, r4 // 2nd Scache error occurred
bne r4, sys_cpu_mchk_not_retryable
bis r31, 0xa3, r4 // EI_STAT Bcache Tag Parity Error, Bcache Tag Control
// Parity Error, Interface Parity Error, 2nd Error
and r25, r4, r4
bne r4, sys_cpu_mchk_not_retryable
// bis r31, #<1@<ei_stat$v_unc_ecc_err-ei_stat$v_bc_tperr>>, r4
bis r31, BIT((ei_stat_v_unc_ecc_err-ei_stat_v_bc_tperr)), r4
and r25, r4, r4 // Isolate the Uncorrectable Error Bit
// bis r31, #<1@<ei_stat$v_fil_ird-ei_stat$v_bc_tperr>>, r6
bis r31, BIT((ei_stat_v_fil_ird-ei_stat_v_bc_tperr)), r6 // Isolate the Iread bit
cmovne r6, 0, r4 // r4 = 0 if IRD or if No Uncorrectable Error
bne r4, sys_cpu_mchk_not_retryable
lda r4, 7(r31)
and r10, r4, r4 // Isolate the Scache Tag Parity Error bits
bne r4, sys_cpu_mchk_not_retryable // All Scache Tag PEs are not retryable
lda r4, 0x7f8(r31)
and r10, r4, r4 // Isolate the Scache Data Parity Error bits
srl r10, sc_stat_v_cbox_cmd, r6
and r6, 0x1f, r6 // Isolate Scache Command field
subq r6, 1, r6 // Scache Iread command = 1
cmoveq r6, 0, r4 // r4 = 0 if IRD or if No Parity Error
bne r4, sys_cpu_mchk_not_retryable
// Look for the system unretryable cases here....
mfpr r4, isr // mchk_interrupt pin asserted
srl r4, isr_v_mck, r4
blbs r4, sys_cpu_mchk_not_retryable
//+
// Look for retryable cases
// In this segment:
// r5<0> = 1 means retryable
// r6 - holds the mchk code
// r4 and r14 are available for scratch
//
//-
// Within the chip, the retryable cases are Istream errors
lda r4, 3(r31)
sll r4, icperr_stat_v_dpe, r4
and r1, r4, r4
cmovne r4, 1, r5 // Retryable if just Icache parity error
lda r4, 0x7f8(r31)
and r10, r4, r4 // Isolate the Scache Data Parity Error bits
srl r10, sc_stat_v_cbox_cmd, r14
and r14, 0x1f, r14 // Isolate Scache Command field
subq r14, 1, r14 // Scache Iread command = 1
cmovne r4, 1, r4 // r4 = 1 if Scache data parity error bit set
cmovne r14, 0, r4 // r4 = 1 if Scache PE and Iread
bis r4, r5, r5 // Accumulate
bis r31, BIT((ei_stat_v_unc_ecc_err-ei_stat_v_bc_tperr)), r4
and r25, r4, r4 // Isolate the Uncorrectable Error Bit
and r25, BIT((ei_stat_v_fil_ird-ei_stat_v_bc_tperr)), r14 // Isolate the Iread bit
cmovne r4, 1, r4 // r4 = 1 if uncorr error
cmoveq r14, 0, r4 // r4 = 1 if uncorr and Iread
bis r4, r5, r5 // Accumulate
mfpr r6, pt_misc
extwl r6, 4, r6 // Fetch mchk code
bic r6, 1, r6 // Clear flag from interrupt flow
cmovne r5, mchk_c_retryable_ird, r6 // Set mchk code
// In the system, the retryable cases are ...
// (code here handles beh model read NXM)
#if beh_model != 0
// .if ne beh_model
ldah r4, 0xC000(r31) // Get base of demon space
lda r4, 0x550(r4) // Add NXM demon flag offset
ldqp r4, 0(r4) // Read the demon register
lda r14, mchk_c_read_nxm(r31)
cmovlbs r4, r14, r6 // Set mchk code if read NXM
cmovlbs r4, 1, r4
bis r4, r5, r5 // Accumulate retry bit
#endif
//+
// Write the logout frame
//
// Current state:
// r0 - fill_syn
// r1 - icperr_stat
// r4 - available
// r5<0> - retry flag
// r6 - mchk code
// r8 - dcperr_stat
// r9 - sc_addr
// r10 - sc_stat
// r12 - ei_addr
// r13 - bc_tag_addr
// r14 - available
// r25 - ei_stat (shifted)
// pt0 - saved r0
// pt1 - saved r1
// pt4 - saved r4
// pt5 - saved r5
// pt6 - saved r6
// pt10 - saved exc_addr
//
//-
sys_mchk_write_logout_frame:
// Get base of the logout area.
GET_IMPURE(r14) // addr of per-cpu impure area
GET_ADDR(r14,pal_logout_area+mchk_mchk_base,r14)
// Write the first 2 quadwords of the logout area:
sll r5, 63, r5 // Move retry flag to bit 63
lda r4, mchk_size(r5) // Combine retry flag and frame size
stqp r4, mchk_flag(r14) // store flag/frame size
lda r4, mchk_sys_base(r31) // sys offset
sll r4, 32, r4
lda r4, mchk_cpu_base(r4) // cpu offset
stqp r4, mchk_offsets(r14) // store sys offset/cpu offset into logout frame
//+
// Write the mchk code to the logout area
// Write error IPRs already fetched to the logout area
// Restore some GPRs from PALtemps
//-
mfpr r5, pt5
stqp r6, mchk_mchk_code(r14)
mfpr r4, pt4
stqp r1, mchk_ic_perr_stat(r14)
mfpr r6, pt6
stqp r8, mchk_dc_perr_stat(r14)
mfpr r1, pt1
stqp r9, mchk_sc_addr(r14)
stqp r10, mchk_sc_stat(r14)
stqp r12, mchk_ei_addr(r14)
stqp r13, mchk_bc_tag_addr(r14)
stqp r0, mchk_fill_syn(r14)
mfpr r0, pt0
sll r25, ei_stat_v_bc_tperr, r25 // Move EI_STAT status bits back to expected position
// retrieve lower 28 bits again from ei_stat and restore before storing to logout frame
ldah r13, 0xfff0(r31)
zapnot r13, 0x1f, r13
ldqp r13, ei_stat(r13)
sll r13, 64-ei_stat_v_bc_tperr, r13
srl r13, 64-ei_stat_v_bc_tperr, r13
or r25, r13, r25
stqp r25, mchk_ei_stat(r14)
//+
// complete the CPU-specific part of the logout frame
//-
#ifndef SIMOS
// cant' assemble.Where is the macro ?
mchk_logout mm_stat
mchk_logout va // Unlocks VA and MM_STAT
mchk_logout isr
mchk_logout icsr
mchk_logout pal_base
mchk_logout exc_mask
mchk_logout exc_sum
#endif
ldah r13, 0xfff0(r31)
zap r13, 0xE0, r13 // Get Cbox IPR base
ldqp r13, ld_lock(r13) // Get ld_lock IPR
stqp r13, mchk_ld_lock(r14) // and stash it in the frame
//+
// complete the PAL-specific part of the logout frame
//-
#ifdef vms
t = 0
.repeat 24
pt_mchk_logout \t
t = t + 1
.endr
#endif
#ifndef SIMOS
//can't assemble ?
pt_mchk_logout 0
pt_mchk_logout 1
pt_mchk_logout 2
pt_mchk_logout 3
pt_mchk_logout 4
pt_mchk_logout 5
pt_mchk_logout 6
pt_mchk_logout 7
pt_mchk_logout 8
pt_mchk_logout 9
pt_mchk_logout 10
pt_mchk_logout 11
pt_mchk_logout 12
pt_mchk_logout 13
pt_mchk_logout 14
pt_mchk_logout 15
pt_mchk_logout 16
pt_mchk_logout 17
pt_mchk_logout 18
pt_mchk_logout 19
pt_mchk_logout 20
pt_mchk_logout 21
pt_mchk_logout 22
pt_mchk_logout 23
#endif
//+
// Log system specific info here
//-
#if alpha_fw != 0
// .if ne alpha_fw
storeTLEP_:
lda r13, 0xffc4(r31) // Get GBUS$MISCR address
sll r13, 24, r13
ldqp r13, 0(r13) // Read GBUS$MISCR
sll r13, 16, r13 // shift up to proper field
mfpr r8, pt_whami // get our node id
extbl r8, 1, r8 // shift to bit 0
or r13, r8, r13 // merge MISCR and WHAMI
stlp r13, mchk$gbus(r14) // write to logout area
srl r8, 1, r8 // shift off cpu number
Get_TLSB_Node_Address r8,r13 // compute our nodespace address
OSFmchk_TLEPstore tldev, tlsb=1
OSFmchk_TLEPstore tlber, tlsb=1, clr=1
OSFmchk_TLEPstore tlcnr, tlsb=1
OSFmchk_TLEPstore tlvid, tlsb=1
OSFmchk_TLEPstore tlesr0, tlsb=1, clr=1
OSFmchk_TLEPstore tlesr1, tlsb=1, clr=1
OSFmchk_TLEPstore tlesr2, tlsb=1, clr=1
OSFmchk_TLEPstore tlesr3, tlsb=1, clr=1
OSFmchk_TLEPstore tlmodconfig
OSFmchk_TLEPstore tlepaerr, clr=1
OSFmchk_TLEPstore tlepderr, clr=1
OSFmchk_TLEPstore tlepmerr, clr=1
OSFmchk_TLEPstore tlintrmask0
OSFmchk_TLEPstore tlintrmask1
OSFmchk_TLEPstore tlintrsum0
OSFmchk_TLEPstore tlintrsum1
OSFmchk_TLEPstore tlep_vmg
// .endc
#endif /*alpha_fw != 0 */
// Unlock IPRs
lda r8, (BIT(dcperr_stat_v_lock)|BIT(dcperr_stat_v_seo))(r31)
mtpr r8, dcperr_stat // Clear Dcache parity error status
lda r8, (BIT(icperr_stat_v_dpe)|BIT(icperr_stat_v_tpe)|BIT(icperr_stat_v_tmr))(r31)
mtpr r8, icperr_stat // Clear Icache parity error & timeout status
1: ldqp r8, mchk_ic_perr_stat(r14) // get ICPERR_STAT value
GET_ADDR(r0,0x1800,r31) // get ICPERR_STAT value
and r0, r8, r0 // compare
beq r0, 2f // check next case if nothing set
lda r0, mchk_c_retryable_ird(r31) // set new MCHK code
br r31, do_670 // setup new vector
2: ldqp r8, mchk_dc_perr_stat(r14) // get DCPERR_STAT value
GET_ADDR(r0,0x3f,r31) // get DCPERR_STAT value
and r0, r8, r0 // compare
beq r0, 3f // check next case if nothing set
lda r0, mchk_c_dcperr(r31) // set new MCHK code
br r31, do_670 // setup new vector
3: ldqp r8, mchk_sc_stat(r14) // get SC_STAT value
GET_ADDR(r0,0x107ff,r31) // get SC_STAT value
and r0, r8, r0 // compare
beq r0, 4f // check next case if nothing set
lda r0, mchk_c_scperr(r31) // set new MCHK code
br r31, do_670 // setup new vector
4: ldqp r8, mchk_ei_stat(r14) // get EI_STAT value
GET_ADDR(r0,0x30000000,r31) // get EI_STAT value
and r0, r8, r0 // compare
beq r0, 5f // check next case if nothing set
lda r0, mchk_c_bcperr(r31) // set new MCHK code
br r31, do_670 // setup new vector
5: ldlp r8, mchk_tlber(r14) // get TLBER value
GET_ADDR(r0,0xfe01,r31) // get high TLBER mask value
sll r0, 16, r0 // shift into proper position
GET_ADDR(r1,0x03ff,r31) // get low TLBER mask value
or r0, r1, r0 // merge mask values
and r0, r8, r0 // compare
beq r0, 6f // check next case if nothing set
GET_ADDR(r0, 0xfff0, r31) // set new MCHK code
br r31, do_660 // setup new vector
6: ldlp r8, mchk_tlepaerr(r14) // get TLEPAERR value
GET_ADDR(r0,0xff7f,r31) // get TLEPAERR mask value
and r0, r8, r0 // compare
beq r0, 7f // check next case if nothing set
GET_ADDR(r0, 0xfffa, r31) // set new MCHK code
br r31, do_660 // setup new vector
7: ldlp r8, mchk_tlepderr(r14) // get TLEPDERR value
GET_ADDR(r0,0x7,r31) // get TLEPDERR mask value
and r0, r8, r0 // compare
beq r0, 8f // check next case if nothing set
GET_ADDR(r0, 0xfffb, r31) // set new MCHK code
br r31, do_660 // setup new vector
8: ldlp r8, mchk_tlepmerr(r14) // get TLEPMERR value
GET_ADDR(r0,0x3f,r31) // get TLEPMERR mask value
and r0, r8, r0 // compare
beq r0, 9f // check next case if nothing set
GET_ADDR(r0, 0xfffc, r31) // set new MCHK code
br r31, do_660 // setup new vector
9: ldqp r8, mchk_ei_stat(r14) // get EI_STAT value
GET_ADDR(r0,0xb,r31) // get EI_STAT mask value
sll r0, 32, r0 // shift to upper lw
and r0, r8, r0 // compare
beq r0, 1f // check next case if nothing set
GET_ADDR(r0,0xfffd,r31) // set new MCHK code
br r31, do_660 // setup new vector
1: ldlp r8, mchk_tlepaerr(r14) // get TLEPAERR value
GET_ADDR(r0,0x80,r31) // get TLEPAERR mask value
and r0, r8, r0 // compare
beq r0, cont_logout_frame // check next case if nothing set
GET_ADDR(r0, 0xfffe, r31) // set new MCHK code
br r31, do_660 // setup new vector
do_670: lda r8, scb_v_procmchk(r31) // SCB vector
br r31, do_6x0_cont
do_660: lda r8, scb_v_sysmchk(r31) // SCB vector
do_6x0_cont:
sll r8, 16, r8 // shift to proper position
mfpr r1, pt_misc // fetch current pt_misc
GET_ADDR(r4,0xffff, r31) // mask for vector field
sll r4, 16, r4 // shift to proper position
bic r1, r4, r1 // clear out old vector field
or r1, r8, r1 // merge in new vector
mtpr r1, pt_misc // save new vector field
stlp r0, mchk_mchk_code(r14) // save new mchk code
cont_logout_frame:
// Restore some GPRs from PALtemps
mfpr r0, pt0
mfpr r1, pt1
mfpr r4, pt4
mfpr r12, pt10 // fetch original PC
blbs r12, sys_machine_check_while_in_pal // MCHK halt if machine check in pal
//XXXbugnion pvc_jsr armc, bsr=1
bsr r12, sys_arith_and_mchk // go check for and deal with arith trap
mtpr r31, exc_sum // Clear Exception Summary
mfpr r25, pt10 // write exc_addr after arith_and_mchk to pickup new pc
stqp r25, mchk_exc_addr(r14)
//+
// Set up the km trap
//-
sys_post_mchk_trap:
mfpr r25, pt_misc // Check for flag from mchk interrupt
extwl r25, 4, r25
blbs r25, sys_mchk_stack_done // Stack from already pushed if from interrupt flow
bis r14, r31, r12 // stash pointer to logout area
mfpr r14, pt10 // get exc_addr
sll r11, 63-3, r25 // get mode to msb
bge r25, 3f
mtpr r31, dtb_cm
mtpr r31, ev5__ps
mtpr r30, pt_usp // save user stack
mfpr r30, pt_ksp
3:
lda sp, 0-osfsf_c_size(sp) // allocate stack space
nop
stq r18, osfsf_a2(sp) // a2
stq r11, osfsf_ps(sp) // save ps
stq r14, osfsf_pc(sp) // save pc
mfpr r25, pt_entint // get the VA of the interrupt routine
stq r16, osfsf_a0(sp) // a0
lda r16, osfint_c_mchk(r31) // flag as mchk in a0
stq r17, osfsf_a1(sp) // a1
mfpr r17, pt_misc // get vector
stq r29, osfsf_gp(sp) // old gp
mtpr r25, exc_addr //
or r31, 7, r11 // get new ps (km, high ipl)
subq r31, 1, r18 // get a -1
extwl r17, 2, r17 // a1 <- interrupt vector
bis r31, ipl_machine_check, r25
mtpr r25, ipl // Set internal ipl
srl r18, 42, r18 // shift off low bits of kseg addr
sll r18, 42, r18 // shift back into position
mfpr r29, pt_kgp // get the kern r29
or r12, r18, r18 // EV4 algorithm - pass pointer to mchk frame as kseg address
hw_rei_spe // out to interrupt dispatch routine
//+
// The stack is pushed. Load up a0,a1,a2 and vector via entInt
//
//-
ALIGN_BRANCH
sys_mchk_stack_done:
lda r16, osfint_c_mchk(r31) // flag as mchk/crd in a0
lda r17, scb_v_sysmchk(r31) // a1 <- interrupt vector
subq r31, 1, r18 // get a -1
mfpr r25, pt_entInt
srl r18, 42, r18 // shift off low bits of kseg addr
mtpr r25, exc_addr // load interrupt vector
sll r18, 42, r18 // shift back into position
or r14, r18, r18 // EV4 algorithm - pass pointer to mchk frame as kseg address
hw_rei_spe // done
ALIGN_BRANCH
sys_cpu_mchk_not_retryable:
mfpr r6, pt_misc
extwl r6, 4, r6 // Fetch mchk code
br r31, sys_mchk_write_logout_frame //
//+
//sys$double_machine_check - a machine check was started, but MCES<MCHK> was
// already set. We will now double machine check halt.
//
// pt0 - old R0
//
//+
EXPORT(sys_double_machine_check)
#ifndef SIMOS
pvc$jsr updpcb, bsr=1
bsr r0, pal_update_pcb // update the pcb
#endif
lda r0, hlt_c_dbl_mchk(r31)
br r31, sys_enter_console
//+
//sys$machine_check_while_in_pal - a machine check was started, exc_addr points to
// a PAL PC. We will now machine check halt.
//
// pt0 - old R0
//
//+
sys_machine_check_while_in_pal:
stqp r12, mchk_exc_addr(r14) // exc_addr has not yet been written
#ifndef SIMOS
pvc$jsr updpcb, bsr=1
bsr r0, pal_update_pcb // update the pcb
#endif
lda r0, hlt_c_mchk_from_pal(r31)
br r31, sys_enter_console
//ARITH and MCHK
// Check for arithmetic errors and build trap frame,
// but don't post the trap.
// on entry:
// pt10 - exc_addr
// r12 - return address
// r14 - logout frame pointer
// r13 - available
// r8,r9,r10 - available except across stq's
// pt0,1,6 - available
//
// on exit:
// pt10 - new exc_addr
// r17 = exc_mask
// r16 = exc_sum
// r14 - logout frame pointer
//
ALIGN_BRANCH
sys_arith_and_mchk:
mfpr r13, ev5__exc_sum
srl r13, exc_sum_v_swc, r13
bne r13, handle_arith_and_mchk
// XXX bugnion pvc$jsr armc, bsr=1, dest=1
ret r31, (r12) // return if no outstanding arithmetic error
handle_arith_and_mchk:
mtpr r31, ev5__dtb_cm // Set Mbox current mode to kernel -
// no virt ref for next 2 cycles
mtpr r14, pt0
mtpr r1, pt1 // get a scratch reg
and r11, osfps_m_mode, r1 // get mode bit
bis r11, r31, r25 // save ps
beq r1, 1f // if zero we are in kern now
bis r31, r31, r25 // set the new ps
mtpr r30, pt_usp // save user stack
mfpr r30, pt_ksp // get kern stack
1:
mfpr r14, exc_addr // get pc into r14 in case stack writes fault
lda sp, 0-osfsf_c_size(sp) // allocate stack space
mtpr r31, ev5__ps // Set Ibox current mode to kernel
mfpr r1, pt_entArith
stq r14, osfsf_pc(sp) // save pc
stq r17, osfsf_a1(sp)
mfpr r17, ev5__exc_mask // Get exception register mask IPR - no mtpr exc_sum in next cycle
stq r29, osfsf_gp(sp)
stq r16, osfsf_a0(sp) // save regs
bis r13, r31, r16 // move exc_sum to r16
stq r18, osfsf_a2(sp)
stq r11, osfsf_ps(sp) // save ps
mfpr r29, pt_kgp // get the kern gp
mfpr r14, pt0 // restore logout frame pointer from pt0
bis r25, r31, r11 // set new ps
mtpr r1, pt10 // Set new PC
mfpr r1, pt1
// XXX bugnion pvc$jsr armc, bsr=1, dest=1
ret r31, (r12) // return if no outstanding arithmetic error
// .sbttl "SYS$ENTER_CONSOLE - Common PALcode for ENTERING console"
ALIGN_BLOCK
// SYS$enter_console
//
// Entry:
// Entered when PAL wants to enter the console.
// usually as the result of a HALT instruction or button,
// or catastrophic error.
//
// Regs on entry...
//
// R0 = halt code
// pt0 <- r0
//
// Function:
//
// Save all readable machine state, and "call" the console
//
// Returns:
//
//
// Notes:
//
// In these routines, once the save state routine has been executed,
// the remainder of the registers become scratchable, as the only
// "valid" copy of them is the "saved" copy.
//
// Any registers or PTs that are modified before calling the save
// routine will have there data lost. The code below will save all
// state, but will loose pt 0,4,5.
//
//-
EXPORT(sys_enter_console)
mtpr r1, pt4
mtpr r3, pt5
#ifdef SIMOS
subq r31, 1, r1
sll r1, 42, r1
ldah r1, 1(r1)
#else /* SIMOS */
lda r3, pal_enter_console_ptr(r31) //find stored vector
ldqp r1, 0(r3)
#endif /* SIMOS */
#ifdef SIMOS
/* taken from scrmax, seems like the obvious thing to do */
mtpr r1, exc_addr
mfpr r1, pt4
mfpr r3, pt5
STALL
STALL
hw_rei_stall
#else
pvc$violate 1007
jmp r31, (r1) // off to common routine
#endif
// .sbttl "SYS$EXIT_CONSOLE - Common PALcode for ENTERING console"
//+
// sys$exit_console
//
// Entry:
// Entered when console wants to reenter PAL.
// usually as the result of a CONTINUE.
//
//
// Regs' on entry...
//
//
// Function:
//
// Restore all readable machine state, and return to user code.
//
//
//
//-
ALIGN_BLOCK
sys_exit_console:
//Disable physical mode:
#if enable_physical_console != 0
// .if ne enable_physical_console
mfpr r25, pt_ptbr
bic r25, 1, r25 // clear physical console flag
mtpr r25, pt_ptbr
#endif
GET_IMPURE(r1)
// clear lock and intr_flags prior to leaving console
rc r31 // clear intr_flag
// lock flag cleared by restore_state
#ifndef SIMOS
pvc$jsr rststa, bsr=1
bsr r3, pal_restore_state // go restore all state
// note, R1 and R3 are NOT restored
// by restore_state.
#endif
// TB's have been flushed
ldqp r3, (cns_gpr+(8*3))(r1) // restore r3
ldqp r1, (cns_gpr+8)(r1) // restore r1
hw_rei_stall // back to user
#if turbo_pcia_intr_fix != 0
// .if ne turbo_pcia_intr_fix
check_pcia_intr:
mfpr r14, pt14 // fetch saved PCIA interrupt info
beq r14, check_done // don't bother checking if no info
mfpr r13, ipl // check the current IPL
bic r13, 3, r25 // isolate ipl<5:2>
cmpeq r25, 0x14, r25 // is it an I/O interrupt?
beq r25, check_done // no, return
and r13, 3, r25 // get I/O interrupt index
extbl r14, r25, r13 // extract info for this interrupt
beq r13, check_done // if no info, return
// This is an RTI from a PCIA interrupt
lda r12, 1(r31) // get initial bit mask
sll r12, r25, r25 // shift to select interrupt index
zap r14, r25, r14 // clear out info from this interrupt
mtpr r14, pt14 // and save it
and r13, 3, r25 // isolate HPC field
subq r25, 1, r25 // subtract 1 to get HPC number
srl r13, 2, r13 // generate base register address
sll r13, 6, r13 // get slot/hose address bits
lda r13, 0x38(r13) // insert other high bits
sll r13, 28, r13 // shift high bits into position
// Read the IPROGx register
sll r25, 21, r14 // HPC address bit position
or r13, r14, r14 // add in upper bits
lda r14, 0x400(r14) // add in lower bits
ldqp r14, 0(r14) // read IPROG
srl r14, 4, r12 // check the In Progress bit
blbc r12, 1f // skip if none in progress
and r14, 0xf, r14 // isolate interrupt source
lda r12, 1(r31) // make initial mask
sll r12, r14, r14 // shift to make new intr source mask
br r31, 2f
// Write the SMPLIRQx register
1: or r31, r31, r14 // default interrupt source mask
2: GET_ADDR(r12, 0xffff, r31) // default SMPLIRQx data
bic r12, r14, r12 // clear any interrupts in progres
//orig lda r14, <0xbffc@-2>(r31) // get register address bits
lda r14,(0xbffc>>2)(r31)
sll r14, 10, r14 // shift into position
or r14, r13, r14 // add in upper bits
sll r25, 8, r25 // shift HPC number into position
or r14, r25, r14 // add in lower bits
stqp r12, 0(r14) // write SMPLIRQx register
mb
ldqp r12, 0(r14) // read it back
bis r12, r12, r12 // touch register to insure completion
check_done: // do these now and return
lda r25, osfsf_c_size(sp) // get updated sp
bis r25, r31, r14 // touch r14,r25 to stall mf exc_addr
br r31, pcia_check_return
#endif
// .sbttl KLUDGE_INITIAL_PCBB - PCB for Boot use only
ALIGN_128
.globl kludge_initial_pcbb
kludge_initial_pcbb: // PCB is 128 bytes long
// .repeat 16
// .quad 0
// .endr
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
// .sbttl "SET_SC_BC_CTL subroutine"
//
// Subroutine to set the SC_CTL, BC_CONFIG, and BC_CTL registers and flush the Scache
// There must be no outstanding memory references -- istream or dstream -- when
// these registers are written. EV5 prefetcher is difficult to turn off. So,
// this routine needs to be exactly 32 instructions long// the final jmp must
// be in the last octaword of a page (prefetcher doesn't go across page)
//
//
// Register expecations:
// r0 base address of CBOX iprs
// r5 value to set sc_ctl to (flush bit is added in)
// r6 value to set bc_ctl to
// r7 value to set bc_config to
// r10 return address
// r19 old sc_ctl value
// r20 old value of bc_ctl
// r21 old value of bc_config
// r23 flush scache flag
// Register usage:
// r17 sc_ctl with flush bit cleared
// r22 loop address
//
//
#ifndef SIMOS
align_page <32*4> // puts start of routine at next page boundary minus 32 longwords.
#endif
set_sc_bc_ctl:
#ifndef SIMOS
br r22, sc_ctl_loop //this branch must be in the same 4 instruction block as it's dest
sc_ctl_loop:
// XXX bugnion pvc$jsr scloop, dest=1
mb
mb
bis r5, r23, r5 //r5 <- same sc_ctl with flush bit set (if flag set in r23)
stqp r19, ev5__sc_ctl(r0) // write sc_ctl
stqp r20, ev5__bc_ctl(r0) // write bc_ctl
bis r31, r6, r20 // update r20 with new bc_ctl for 2nd time through loop
stqp r21, bc_config(r0) // write bc_config register
bis r31, r7, r21 // update r21 with new bc_config for 2nd time through loop
bic r19, BIT(sc_ctl_v_sc_flush), r17 //r17 <- same sc_ctl without flush bit set
//NOTE: only works because flush bit is in lower 16 bits
wmb // don't merge with other writes
stqp r17, ev5__sc_ctl(r0) // write sc_ctl without flush bit
ldqp r17, ev5__sc_ctl(r0) // read sc_ctl
bis r17, r17, r17 // stall until the data comes back
bis r31, r5, r19 // update r19 with new sc_ctl for 2nd time through loop
// fill with requisite number of nops (unops ok) to make exactly 32 instructions in loop
t = 0
.repeat 15
unop
t = t + 1
.endr
$opdef mnemonic= myjmp, -
format= <custom=iregister, iregister, branch_offset>, -
encoding= <26:31=0x1A, 21:25=%OP1,16:20=%OP2,14:15=0x00,0:13=%op3>
// XXXbugnion pvc$jsr scloop
myjmp r22,r22,sc_ctl_loop // first time, jump to sc_ctl_loop (hint will cause prefetcher to go to loop instead
// of straight) // r22 gets sc_ctl_done
// 2nd time, code continues at sc_ctl_done (I hope)
sc_ctl_done:
// XXX bugnion pvc$jsr scloop, dest=1
// XXX bugnion pvc$jsr scbcctl
#endif /*SIMOS*/
ret r31, (r10) // return to where we came from
.end
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