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| author | Paul Burton <paulburton@kernel.org> | 2025-01-29 13:32:49 +0100 |
|---|---|---|
| committer | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2025-02-21 10:19:34 +0100 |
| commit | 75fa6a583882e8e09fa567eb3a3d8e115fa5c59f (patch) | |
| tree | 2b7dd0a8c3b365f45caad128206eb8f1f3020a33 /arch/mips/kernel/cps-vec.S | |
| parent | 00a134fc2bb4a5f8fada58cf7ff4259149691d64 (diff) | |
| download | lwn-75fa6a583882e8e09fa567eb3a3d8e115fa5c59f.tar.gz lwn-75fa6a583882e8e09fa567eb3a3d8e115fa5c59f.zip | |
MIPS: CPS: Introduce struct cluster_boot_config
In preparation for supporting multi-cluster systems, introduce a struct
cluster_boot_config as an extra layer in the boot configuration
maintained by the MIPS Coherent Processing System (CPS) SMP
implementation. For now only one struct cluster_boot_config will be
allocated & we'll simply defererence its core_config field to find the
struct core_boot_config array which can be used to boot as usual.
Signed-off-by: Paul Burton <paulburton@kernel.org>
Signed-off-by: Dragan Mladjenovic <dragan.mladjenovic@syrmia.com>
Signed-off-by: Aleksandar Rikalo <arikalo@gmail.com>
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Tested-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Diffstat (limited to 'arch/mips/kernel/cps-vec.S')
| -rw-r--r-- | arch/mips/kernel/cps-vec.S | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/arch/mips/kernel/cps-vec.S b/arch/mips/kernel/cps-vec.S index f876309130ad..2ae7034a3d5c 100644 --- a/arch/mips/kernel/cps-vec.S +++ b/arch/mips/kernel/cps-vec.S @@ -19,6 +19,10 @@ #define GCR_CPC_BASE_OFS 0x0088 #define GCR_CL_COHERENCE_OFS 0x2008 #define GCR_CL_ID_OFS 0x2028 +#define CM3_GCR_Cx_ID_CLUSTER_SHF 8 +#define CM3_GCR_Cx_ID_CLUSTER_MSK (0xff << 8) +#define CM3_GCR_Cx_ID_CORENUM_SHF 0 +#define CM3_GCR_Cx_ID_CORENUM_MSK (0xff << 0) #define CPC_CL_VC_STOP_OFS 0x2020 #define CPC_CL_VC_RUN_OFS 0x2028 @@ -271,12 +275,21 @@ LEAF(mips_cps_core_init) */ LEAF(mips_cps_get_bootcfg) /* Calculate a pointer to this cores struct core_boot_config */ + PTR_LA v0, mips_cps_cluster_bootcfg + PTR_L v0, 0(v0) lw t0, GCR_CL_ID_OFS(s1) +#ifdef CONFIG_CPU_MIPSR6 + ext t1, t0, CM3_GCR_Cx_ID_CLUSTER_SHF, 8 + li t2, CLUSTERBOOTCFG_SIZE + mul t1, t1, t2 + PTR_ADDU \ + v0, v0, t1 +#endif + PTR_L v0, CLUSTERBOOTCFG_CORECONFIG(v0) + andi t0, t0, CM3_GCR_Cx_ID_CORENUM_MSK li t1, COREBOOTCFG_SIZE mul t0, t0, t1 - PTR_LA t1, mips_cps_core_bootcfg - PTR_L t1, 0(t1) - PTR_ADDU v0, t0, t1 + PTR_ADDU v0, v0, t0 /* Calculate this VPEs ID. If the core doesn't support MT use 0 */ li t9, 0 |