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85xx: Introduce determine_mp_bootpg() helper.

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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>
This commit is contained in:
Kumar Gala 2009-03-31 23:11:05 -05:00
parent 7649a590b5
commit c840d26c75
3 changed files with 16 additions and 23 deletions
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9
cpu/mpc85xx/fdt.c
View file

@ -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) {

26
cpu/mpc85xx/mp.c
View file

@ -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);

4
cpu/mpc85xx/mp.h
View file

@ -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