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authorSonic Zhang <sonic.zhang@analog.com>2010-08-05 07:49:26 +0000
committerMike Frysinger <vapier@gentoo.org>2011-03-18 04:01:04 -0400
commitc6345ab1a3d17f4b6c80ac79d7fb0f006b32fdaa (patch)
tree8f3980f69cba2e3269aa9688426fca95be56d7a6 /arch/blackfin/mach-bf561/smp.c
parent6f546bc3ac9eedbf770bf3bcbc45ce2ea32c94ad (diff)
Blackfin: SMP: work around anomaly 05000491
In order to safely work around anomaly 05000491, we have to execute IFLUSH from L1 instruction sram. The trouble with multi-core systems is that all L1 sram is visible only to the active core. So we can't just place the functions into L1 and call it directly. We need to setup a jump table and place the entry point in external memory. This will call the right func based on the active core. In the process, convert from the manual relocation of a small bit of code into Core B's L1 to the more general framework we already have in place for loading arbitrary pieces of code into L1. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch/blackfin/mach-bf561/smp.c')
-rw-r--r--arch/blackfin/mach-bf561/smp.c9
1 files changed, 1 insertions, 8 deletions
diff --git a/arch/blackfin/mach-bf561/smp.c b/arch/blackfin/mach-bf561/smp.c
index 1074a7ef81c7..82b94e137886 100644
--- a/arch/blackfin/mach-bf561/smp.c
+++ b/arch/blackfin/mach-bf561/smp.c
@@ -30,18 +30,11 @@ void __init platform_init_cpus(void)
void __init platform_prepare_cpus(unsigned int max_cpus)
{
- int len;
-
- len = &coreb_trampoline_end - &coreb_trampoline_start + 1;
- BUG_ON(len > L1_CODE_LENGTH);
-
- dma_memcpy((void *)COREB_L1_CODE_START, &coreb_trampoline_start, len);
+ bfin_relocate_coreb_l1_mem();
/* Both cores ought to be present on a bf561! */
cpu_set(0, cpu_present_map); /* CoreA */
cpu_set(1, cpu_present_map); /* CoreB */
-
- printk(KERN_INFO "CoreB bootstrap code to SRAM %p via DMA.\n", (void *)COREB_L1_CODE_START);
}
int __init setup_profiling_timer(unsigned int multiplier) /* not supported */