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>
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@ -39,13 +39,8 @@ void ft_fixup_cpu(void *blob, u64 memory_limit)
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{
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{
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int off;
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int off;
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ulong spin_tbl_addr = get_spin_addr();
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ulong spin_tbl_addr = get_spin_addr();
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u32 bootpg, id = get_my_id();
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u32 bootpg = determine_mp_bootpg();
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u32 id = get_my_id();
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/* if we have 4G or more of memory, put the boot page at 4Gb-4k */
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if ((u64)gd->ram_size > 0xfffff000)
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bootpg = 0xfffff000;
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else
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bootpg = gd->ram_size - 4096;
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off = fdt_node_offset_by_prop_value(blob, -1, "device_type", "cpu", 4);
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off = fdt_node_offset_by_prop_value(blob, -1, "device_type", "cpu", 4);
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while (off != -FDT_ERR_NOTFOUND) {
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while (off != -FDT_ERR_NOTFOUND) {
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@ -38,6 +38,7 @@ int cpu_reset(int nr)
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{
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{
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volatile ccsr_pic_t *pic = (void *)(CONFIG_SYS_MPC85xx_PIC_ADDR);
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volatile ccsr_pic_t *pic = (void *)(CONFIG_SYS_MPC85xx_PIC_ADDR);
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out_be32(&pic->pir, 1 << nr);
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out_be32(&pic->pir, 1 << nr);
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/* the dummy read works around an errata on early 85xx MP PICs */
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(void)in_be32(&pic->pir);
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(void)in_be32(&pic->pir);
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out_be32(&pic->pir, 0x0);
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out_be32(&pic->pir, 0x0);
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@ -112,6 +113,15 @@ int cpu_release(int nr, int argc, char *argv[])
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return 0;
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return 0;
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}
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}
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u32 determine_mp_bootpg(void)
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{
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/* if we have 4G or more of memory, put the boot page at 4Gb-4k */
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if ((u64)gd->ram_size > 0xfffff000)
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return (0xfffff000);
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return (gd->ram_size - 4096);
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}
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ulong get_spin_addr(void)
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ulong get_spin_addr(void)
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{
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{
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extern ulong __secondary_start_page;
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extern ulong __secondary_start_page;
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@ -188,13 +198,7 @@ static void pq3_mp_up(unsigned long bootpg)
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void cpu_mp_lmb_reserve(struct lmb *lmb)
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void cpu_mp_lmb_reserve(struct lmb *lmb)
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{
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{
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u32 bootpg;
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u32 bootpg = determine_mp_bootpg();
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/* if we have 4G or more of memory, put the boot page at 4Gb-4k */
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if ((u64)gd->ram_size > 0xfffff000)
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bootpg = 0xfffff000;
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else
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bootpg = gd->ram_size - 4096;
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lmb_reserve(lmb, bootpg, 4096);
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lmb_reserve(lmb, bootpg, 4096);
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}
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}
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@ -203,13 +207,7 @@ void setup_mp(void)
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{
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{
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extern ulong __secondary_start_page;
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extern ulong __secondary_start_page;
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ulong fixup = (ulong)&__secondary_start_page;
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ulong fixup = (ulong)&__secondary_start_page;
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u32 bootpg;
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u32 bootpg = determine_mp_bootpg();
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/* if we have 4G or more of memory, put the boot page at 4Gb-4k */
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if ((u64)gd->ram_size > 0xfffff000)
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bootpg = 0xfffff000;
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else
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bootpg = gd->ram_size - 4096;
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memcpy((void *)bootpg, (void *)fixup, 4096);
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memcpy((void *)bootpg, (void *)fixup, 4096);
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flush_cache(bootpg, 4096);
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flush_cache(bootpg, 4096);
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@ -1,10 +1,10 @@
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#ifndef __MPC85XX_MP_H_
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#ifndef __MPC85XX_MP_H_
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#define __MPC85XX_MP_H_
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#define __MPC85XX_MP_H_
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#include <asm/mp.h>
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ulong get_spin_addr(void);
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ulong get_spin_addr(void);
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void setup_mp(void);
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u32 get_my_id(void);
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u32 get_my_id(void);
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void cpu_mp_lmb_reserve(struct lmb *lmb);
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#define BOOT_ENTRY_ADDR_UPPER 0
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#define BOOT_ENTRY_ADDR_UPPER 0
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#define BOOT_ENTRY_ADDR_LOWER 1
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#define BOOT_ENTRY_ADDR_LOWER 1
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