diff options
Diffstat (limited to 'system/alpha/palcode/platform_m5.s')
| -rw-r--r-- | system/alpha/palcode/platform_m5.s | 97 |
1 files changed, 49 insertions, 48 deletions
diff --git a/system/alpha/palcode/platform_m5.s b/system/alpha/palcode/platform_m5.s index 9012fd79e..ce7a9fedb 100644 --- a/system/alpha/palcode/platform_m5.s +++ b/system/alpha/palcode/platform_m5.s @@ -756,17 +756,17 @@ sys_int_23: ALIGN_BRANCH sys_int_22: or r31,1,r16 // a0 means it is a clock interrupt - lda r8,0xf01(r31) // build up an address for the MISC register - sll r8,16,r8 - lda r8,0xa000(r8) - sll r8,16,r8 - lda r8,0x080(r8) + 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(r8) // read misc register + ldq_p r10,0(r12) // read misc register and r10,0x3,r10 // isolate CPUID - or r31,0x10,r9 // load r9 with bit to clear - sll r9,r10,r9 // left shift by CPU ID - stq_p r9, 0(r8) // clear the rtc interrupt + or r31,0x10,r14 // load r9 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 @@ -802,56 +802,57 @@ sys_int_20: ALIGN_BRANCH sys_int_21: - or r31,3,r16 // a0 means it is a I/O interrupt - lda r8,0xf01(r31) - sll r8,32,r8 - ldah r9,0xa0(r31) - sll r9,8,r9 - bis r8,r9,r8 - lda r8,0x0080(r8) - ldqp r9, 0(r8) // read the MISC register for CPUID + 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 r9,0x1,r10 // grab LSB and shift left 2 - sll r10,2,r10 - and r9,0x2,r11 // grabl LSB+1 and shift left 5 - sll r11,5,r11 + and r13,0x1,r14 // grab LSB and shift left 2 + sll r14,2,r14 + and r13,0x2,r10 // grabl LSB+1 and shift left 5 + sll r10,5,r10 - mskbl r8,0,r8 // calculate DIRn address - lda r9,0x280(r31) - bis r8,r9,r8 - or r8,r10,r8 - or r8,r11,r8 - ldqp r9, 0(r8) // read DIRn - - or r31,1,r10 // set bit 55 (ISA Interrupt) - sll r10,55,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 r9, r10, r10 // check if bit 55 is set - lda r13,0x900(r31) // load offset for normal into r13 - beq r10, normal_int // if not compute the vector normally + 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 r13,0x800(r31) // replace with offset for pic - lda r8,0xf01(r31) // build an addr to access PIC - sll r8,32,r8 // at f01fc000000 - ldah r9,0xfc(r31) - sll r9,8,r9 - bis r8,r9,r8 - ldqp r9,0x0020(r8) // read PIC1 ISR for interrupting dev + 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 r9,r10 // count the number of leading zeros + //ctlz r13,r14 // count the number of leading zeros // EV5 doesn't have ctlz, but we do, so lets use it - .byte 0x4a + .byte 0x4e .byte 0x06 - .byte 0xe9 + .byte 0xed .byte 0x73 - lda r11,63(r31) - subq r11,r10,r17 // subtract from + 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 - lda r9,0x10(r31) - mulq r17,r9,r17 // compute 0x900 + (0x10 * Highest DIRn-bit) - addq r17,r13,r17 + or r31,3,r16 // a0 means it is a I/O interrupt br r31, pal_post_interrupt |