diff options
Diffstat (limited to 'system/alpha/console/dbmentry.S')
| -rw-r--r-- | system/alpha/console/dbmentry.S | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/system/alpha/console/dbmentry.S b/system/alpha/console/dbmentry.S index 38e614585..c8a3691e3 100644 --- a/system/alpha/console/dbmentry.S +++ b/system/alpha/console/dbmentry.S @@ -56,6 +56,7 @@ */ #include "fromHudsonOsf.h" + .extern myAlphaAccess .text /* return address and padding to octaword align */ @@ -68,11 +69,24 @@ _entry: br t0, 2f # get the current PC 2: ldgp gp, 0(t0) # init gp - /* - * SimOS. Stack pointer is start of a valid phys or KSEG page - */ +/* Processor 0 start stack frame is begining of physical memory (0) + Other processors spin here waiting to get their stacks from + Processor 0, then they can progress as normal. +*/ + call_pal PAL_WHAMI_ENTRY + beq v0, cpuz + ldq t3, m5AlphaAccess + addq t3,0x70,t3 # *** If offset in console alpha access struct changes + # This must be changed as well! + bis zero,8,t4 + mulq t4,v0,t4 + addq t3,t4,t3 +cpuwait: ldq t4, 0(t3) + beq t4, cpuwait + bis t4,t4,sp + - bis sp,sp,s0 /* save sp */ +cpuz: bis sp,sp,s0 /* save sp */ slave: lda v0,(8*1024)(sp) /* end of page */ @@ -96,6 +110,7 @@ slave: lda v0,(8*1024)(sp) /* end of page */ * Every good C program has a main() */ +/* If stack pointer was 0, then this is CPU0*/ beq s0,master call_pal PAL_WHAMI_ENTRY |