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update platform code to use PALTemp Whami register to get cpu id

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instead of reading register from tsunami chipset, saving an uncached
read
This commit is contained in:
Ali Saidi 2004-11-23 02:01:30 -05:00
parent 8b1db1cf98
commit 8cfbcbdb9c
2 changed files with 17 additions and 1910 deletions
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33
system/alpha/palcode/platform_m5.s
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@ -743,19 +743,19 @@ EXPORT(sys_interrupt)
//-
ALIGN_BRANCH
sys_int_23:
or r31,0,r16 // IPI interrupt A0 = 0
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
mfpr r10, pt_whami // get CPU ID
extbl r10, 1, r10 // Isolate just whami bits
or r31,0x1,r14 // load r14 with bit to clear
sll r14,r10,r14 // left shift by CPU ID
sll r14,r10,r14 // left shift by CPU ID
sll r14,8,r14
stq_p r14, 0(r12) // clear the rtc interrupt
stq_p r14, 0(r12) // clear the rtc interrupt
br r31, pal_post_interrupt // Notify the OS
@ -763,17 +763,17 @@ sys_int_23:
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
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
mfpr r10, pt_whami // get CPU ID
extbl r10, 1, r10 // Isolate just whami bits
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
@ -816,19 +816,20 @@ sys_int_21:
sll r13,8,r13
bis r12,r13,r12
lda r12,0x0080(r12)
ldqp r13, 0(r12) // read the MISC register for CPUID
mfpr r13, pt_whami // get CPU ID
extbl r13, 1, r10 // Isolate just whami bits
and r13,0x1,r14 // grab LSB and shift left 6
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
and r13,0x2,r10 // grabl LSB+1 and shift left 9
sll r10,9,r10
mskbl r12,0,r12 // calculate DIRn address
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
ldqp r13, 0(r12) // read DIRn
or r31,1,r14 // set bit 55 (ISA Interrupt)
sll r14,55,r14

1894
system/alpha/palcode/platform_srcmax.s
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