Author: luporl
Date: Mon Oct 15 16:43:07 2018
New Revision: 339360
URL: https://svnweb.freebsd.org/changeset/base/339360
Log:
Initialize SPRG0 before its first possible use
At early boot, PCPU_GET(), that obtains a pointer from SPRG0, was being
used with SPRG0 not yet initialized. If it pointed to an invalid
address, the machine would hang.
Approved by: re(gjb), jhibbits(mentor)
Modified:
head/sys/powerpc/powerpc/machdep.c
Modified: head/sys/powerpc/powerpc/machdep.c
==============================================================================
--- head/sys/powerpc/powerpc/machdep.c Mon Oct 15 10:50:04 2018
(r339359)
+++ head/sys/powerpc/powerpc/machdep.c Mon Oct 15 16:43:07 2018
(r339360)
@@ -383,12 +383,12 @@ powerpc_init(vm_offset_t fdt, vm_offset_t toc, vm_offs
if (platform_smp_get_bsp(&bsp) != 0)
bsp.cr_cpuid = 0;
pc = &__pcpu[bsp.cr_cpuid];
+ __asm __volatile("mtsprg 0, %0" :: "r"(pc));
pcpu_init(pc, bsp.cr_cpuid, sizeof(struct pcpu));
pc->pc_curthread = &thread0;
thread0.td_oncpu = bsp.cr_cpuid;
pc->pc_cpuid = bsp.cr_cpuid;
pc->pc_hwref = bsp.cr_hwref;
- __asm __volatile("mtsprg 0, %0" :: "r"(pc));
/*
* Init KDB
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