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authorAli Saidi <saidi@eecs.umich.edu>2006-02-23 15:00:04 -0500
committerAli Saidi <saidi@eecs.umich.edu>2006-02-23 15:00:04 -0500
commita50e054ceded6fa3f700385ed93dcc76c05cb13b (patch)
tree71e585f8f1fb479c935cae15a89f6be0b4d7d511 /system/alpha/console
parentc3d47c1de8db97e1bf6d4a075d9bcc42af010e34 (diff)
downloadgem5-a50e054ceded6fa3f700385ed93dcc76c05cb13b.tar.xz
change from bootStrap* to using the cpuStack array for setting up
other processor stacks
Diffstat (limited to 'system/alpha/console')
-rw-r--r--system/alpha/console/console.c5
-rw-r--r--system/alpha/console/dbmentry.S23
2 files changed, 20 insertions, 8 deletions
diff --git a/system/alpha/console/console.c b/system/alpha/console/console.c
index e5be19f5f..1bf6a3ce2 100644
--- a/system/alpha/console/console.c
+++ b/system/alpha/console/console.c
@@ -187,8 +187,6 @@ main(int argc, char **argv)
m5Conf.diskOperation = m5AlphaAccess->diskOperation;
m5Conf.outputChar = m5AlphaAccess->outputChar;
m5Conf.inputChar = m5AlphaAccess->inputChar;
- m5Conf.bootStrapImpure = m5AlphaAccess->bootStrapImpure;
- m5Conf.bootStrapCPU = m5AlphaAccess->bootStrapCPU;
if (m5Conf.version != ALPHA_ACCESS_VERSION) {
panic("Console version mismatch. Console expects %d. has %d \n",
@@ -743,8 +741,7 @@ unixBoot(int argc, char **argv)
for (i = 1; i < m5Conf.numCPUs; i++) {
ulong stack = (ulong)unix_boot_alloc(1);
printf_lock("Bootstraping CPU %d with sp=0x%x\n", i, stack);
- m5AlphaAccess->bootStrapImpure = stack;
- m5AlphaAccess->bootStrapCPU = i;
+ m5AlphaAccess->cpuStack[i] = stack;
}
/*
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