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authorKumar Gala <galak@kernel.crashing.org>2009-03-31 23:11:05 -0500
committerKumar Gala <galak@kernel.crashing.org>2009-04-01 15:29:49 -0500
commitc840d26c752141b94bbc24ac748ddd45752a955a (patch)
tree2782cd8b9721c9706495e782b363f29dc01c6453 /cpu/mpc85xx
parent7649a590b53ee548f41428bf20780f74ce9fc099 (diff)
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85xx: Introduce determine_mp_bootpg() helper.
Match determine_mp_bootpg() that was added for 86xx. We need this to address a bug introduced in v2009.03 with 86xx MP booting. We have to make sure to reserve the region of memory used for the MP bootpg() so other u-boot code doesn't use it. Also added a comment about how cpu_reset() is dealing w/an errata on early 85xx MP HW. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'cpu/mpc85xx')
-rw-r--r--cpu/mpc85xx/fdt.c9
-rw-r--r--cpu/mpc85xx/mp.c26
-rw-r--r--cpu/mpc85xx/mp.h4
3 files changed, 16 insertions, 23 deletions
diff --git a/cpu/mpc85xx/fdt.c b/cpu/mpc85xx/fdt.c
index 2d36c24..26a8f48 100644
--- a/cpu/mpc85xx/fdt.c
+++ b/cpu/mpc85xx/fdt.c
@@ -39,13 +39,8 @@ void ft_fixup_cpu(void *blob, u64 memory_limit)
{
int off;
ulong spin_tbl_addr = get_spin_addr();
- u32 bootpg, id = get_my_id();
-
- /* if we have 4G or more of memory, put the boot page at 4Gb-4k */
- if ((u64)gd->ram_size > 0xfffff000)
- bootpg = 0xfffff000;
- else
- bootpg = gd->ram_size - 4096;
+ u32 bootpg = determine_mp_bootpg();
+ u32 id = get_my_id();
off = fdt_node_offset_by_prop_value(blob, -1, "device_type", "cpu", 4);
while (off != -FDT_ERR_NOTFOUND) {
diff --git a/cpu/mpc85xx/mp.c b/cpu/mpc85xx/mp.c
index 3338c1a..76f02a4 100644
--- a/cpu/mpc85xx/mp.c
+++ b/cpu/mpc85xx/mp.c
@@ -38,6 +38,7 @@ int cpu_reset(int nr)
{
volatile ccsr_pic_t *pic = (void *)(CONFIG_SYS_MPC85xx_PIC_ADDR);
out_be32(&pic->pir, 1 << nr);
+ /* the dummy read works around an errata on early 85xx MP PICs */
(void)in_be32(&pic->pir);
out_be32(&pic->pir, 0x0);
@@ -112,6 +113,15 @@ int cpu_release(int nr, int argc, char *argv[])
return 0;
}
+u32 determine_mp_bootpg(void)
+{
+ /* if we have 4G or more of memory, put the boot page at 4Gb-4k */
+ if ((u64)gd->ram_size > 0xfffff000)
+ return (0xfffff000);
+
+ return (gd->ram_size - 4096);
+}
+
ulong get_spin_addr(void)
{
extern ulong __secondary_start_page;
@@ -188,13 +198,7 @@ static void pq3_mp_up(unsigned long bootpg)
void cpu_mp_lmb_reserve(struct lmb *lmb)
{
- u32 bootpg;
-
- /* if we have 4G or more of memory, put the boot page at 4Gb-4k */
- if ((u64)gd->ram_size > 0xfffff000)
- bootpg = 0xfffff000;
- else
- bootpg = gd->ram_size - 4096;
+ u32 bootpg = determine_mp_bootpg();
lmb_reserve(lmb, bootpg, 4096);
}
@@ -203,13 +207,7 @@ void setup_mp(void)
{
extern ulong __secondary_start_page;
ulong fixup = (ulong)&__secondary_start_page;
- u32 bootpg;
-
- /* if we have 4G or more of memory, put the boot page at 4Gb-4k */
- if ((u64)gd->ram_size > 0xfffff000)
- bootpg = 0xfffff000;
- else
- bootpg = gd->ram_size - 4096;
+ u32 bootpg = determine_mp_bootpg();
memcpy((void *)bootpg, (void *)fixup, 4096);
flush_cache(bootpg, 4096);
diff --git a/cpu/mpc85xx/mp.h b/cpu/mpc85xx/mp.h
index 4329286..2c2929e 100644
--- a/cpu/mpc85xx/mp.h
+++ b/cpu/mpc85xx/mp.h
@@ -1,10 +1,10 @@
#ifndef __MPC85XX_MP_H_
#define __MPC85XX_MP_H_
+#include <asm/mp.h>
+
ulong get_spin_addr(void);
-void setup_mp(void);
u32 get_my_id(void);
-void cpu_mp_lmb_reserve(struct lmb *lmb);
#define BOOT_ENTRY_ADDR_UPPER 0
#define BOOT_ENTRY_ADDR_LOWER 1