diff options
Diffstat (limited to 'system/alpha')
| -rw-r--r-- | system/alpha/palcode/platform_m5.s | 34 |
1 files changed, 20 insertions, 14 deletions
diff --git a/system/alpha/palcode/platform_m5.s b/system/alpha/palcode/platform_m5.s index f457147ea..931f3906c 100644 --- a/system/alpha/palcode/platform_m5.s +++ b/system/alpha/palcode/platform_m5.s @@ -798,12 +798,13 @@ sys_int_21: sys_int_20: or r31,3,r16 // a0 means it is a I/O interrupt - bis r31,0x801,r8 - sll r8,16,r8 - bis r8,0xa000,r8 - sll r8,16,r8 - bis r8,0x80,r8 - ldl_p r9, 0(r8) // read the MISC register + lda r8,0x0801(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 and r9,0x1,r10 // grab LSB and shift left 2 sll r10,2,r10 @@ -811,23 +812,28 @@ sys_int_20: sll r11,5,r11 mskbl r8,0,r8 // calculate DIRn address - bis r8,0x280,r8 + lda r9,0x280(r31) + bis r8,r9,r8 or r8,r10,r8 or r8,r11,r8 - ldl_p r9, 0(r8) // read DIRn + ldqp r9, 0(r8) // read DIRn - or r31,1,r17 - sll r17,63,r17 // load a 1 into the msb + or r31,63,r17 // load 63 into the counter + or r31,1,r11 + sll r11,63,r11 // load a 1 into the msb find_msb: - and r9,r17,r10 + and r9,r11,r10 bne r10, found_msb - srl r17,1,r17 + srl r11,1,r11 + subl r17,1,r17 br r31, find_msb found_msb: - mulq r17,0x10,r17 // compute 0x900 + (0x10 * Highest DIRn-bit) - addq r17,0x900,r17 + lda r9,0x10(r31) + mulq r17,r9,r17 // compute 0x900 + (0x10 * Highest DIRn-bit) + lda r9,0x900(r31) + addq r17,r9,r17 br r31, pal_post_interrupt |