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powerpc/mpc8xxx: fix core id for multicore booting

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For the cores with multiple threads, we need to figure out which physical
core a thread belongs. To match the core ids, update PIR registers and
spin tables.

Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Andy Fleming <afleming@freescale.com>
This commit is contained in:
York Sun 2012-08-17 08:20:26 +00:00 committed by Andy Fleming
parent ffdf8890ae
commit 709389b654
4 changed files with 53 additions and 6 deletions
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5
arch/powerpc/cpu/mpc85xx/fdt.c
View file

@ -57,8 +57,9 @@ void ft_fixup_cpu(void *blob, u64 memory_limit)
u32 *reg = (u32 *)fdt_getprop(blob, off, "reg", 0);
if (reg) {
u64 val = *reg * SIZE_BOOT_ENTRY + spin_tbl_addr;
val = cpu_to_fdt32(val);
u32 phys_cpu_id = thread_to_core(*reg);
u64 val = phys_cpu_id * SIZE_BOOT_ENTRY + spin_tbl_addr;
val = cpu_to_fdt64(val);
if (*reg == id) {
fdt_setprop_string(blob, off, "status",
"okay");

45
arch/powerpc/cpu/mpc85xx/release.S
View file

@ -1,5 +1,5 @@
/*
* Copyright 2008-2011 Freescale Semiconductor, Inc.
* Copyright 2008-2012 Freescale Semiconductor, Inc.
* Kumar Gala <kumar.gala@freescale.com>
*
* See file CREDITS for list of people who contributed to this
@ -155,7 +155,27 @@ __secondary_start_page:
/* r10 has the base address for the entry */
mfspr r0,SPRN_PIR
#ifdef CONFIG_E500MC
#if defined(CONFIG_E6500)
/*
* PIR definition for E6500
* 0-17 Reserved (logic 0s)
* 8-19 CHIP_ID, 2’b00 - SoC 1
* all others - reserved
* 20-24 CLUSTER_ID 5’b00000 - CCM 1
* all others - reserved
* 25-26 CORE_CLUSTER_ID 2’b00 - cluster 1
* 2’b01 - cluster 2
* 2’b10 - cluster 3
* 2’b11 - cluster 4
* 27-28 CORE_ID 2’b00 - core 0
* 2’b01 - core 1
* 2’b10 - core 2
* 2’b11 - core 3
* 29-31 THREAD_ID 3’b000 - thread 0
* 3’b001 - thread 1
*/
rlwinm r4,r0,29,25,31
#elif defined(CONFIG_E500MC)
rlwinm r4,r0,27,27,31
#else
mr r4,r0
@ -170,6 +190,25 @@ __secondary_start_page:
mtspr L1CSR2,r8
#endif
#ifdef CONFIG_E6500
mfspr r0,SPRN_PIR
/*
* core 0 thread 0: pir reset value 0x00, new pir 0
* core 0 thread 1: pir reset value 0x01, new pir 1
* core 1 thread 0: pir reset value 0x08, new pir 2
* core 1 thread 1: pir reset value 0x09, new pir 3
* core 2 thread 0: pir reset value 0x10, new pir 4
* core 2 thread 1: pir reset value 0x11, new pir 5
* etc.
*
* Only thread 0 of each core will be running, updating PIR doesn't
* need to deal with the thread bits.
*/
rlwinm r4,r0,30,24,30
#endif
mtspr SPRN_PIR,r4 /* write to PIR register */
#if defined(CONFIG_SYS_P4080_ERRATUM_CPU22) || \
defined(CONFIG_SYS_FSL_ERRATUM_NMG_CPU_A011)
/*
@ -253,7 +292,7 @@ __secondary_start_page:
/* setup the entry */
li r3,0
li r8,1
stw r0,ENTRY_PIR(r10)
stw r4,ENTRY_PIR(r10)
stw r3,ENTRY_ADDR_UPPER(r10)
stw r8,ENTRY_ADDR_LOWER(r10)
stw r3,ENTRY_R3_UPPER(r10)

3
arch/powerpc/cpu/mpc8xxx/fdt.c
View file

@ -62,8 +62,9 @@ void ft_fixup_num_cores(void *blob) {
off = fdt_node_offset_by_prop_value(blob, -1, "device_type", "cpu", 4);
while (off != -FDT_ERR_NOTFOUND) {
u32 *reg = (u32 *)fdt_getprop(blob, off, "reg", 0);
u32 phys_cpu_id = thread_to_core(*reg);
if (!is_core_valid(*reg) || is_core_disabled(*reg)) {
if (!is_core_valid(phys_cpu_id) || is_core_disabled(phys_cpu_id)) {
int ph = fdt_get_phandle(blob, off);
/* Delete the cpu node once there are no cpu handles */

6
arch/powerpc/include/asm/mp.h
View file

@ -28,4 +28,10 @@ void cpu_mp_lmb_reserve(struct lmb *lmb);
u32 determine_mp_bootpg(void);
int is_core_disabled(int nr);
#ifdef CONFIG_E6500
#define thread_to_core(x) (x >> 1)
#else
#define thread_to_core(x) (x)
#endif
#endif