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author | Vikram Kanigiri <vikram.kanigiri@arm.com> | 2015-01-29 18:27:38 +0000 |
---|---|---|
committer | Vikram Kanigiri <vikram.kanigiri@arm.com> | 2015-03-13 10:38:09 +0000 |
commit | 12e7c4ab0bbc9d9d4e950bdbda5a86f61c13bc1a (patch) | |
tree | b8a888b28f2df72aaae1b759fa3c3c74c8693a2a | |
parent | 5930eadbe5d8d4c3f15fd910476f72cd5bf86f44 (diff) | |
download | arm-trusted-firmware-12e7c4ab0bbc9d9d4e950bdbda5a86f61c13bc1a.tar.gz |
Initialise cpu ops after enabling data cache
The cpu-ops pointer was initialized before enabling the data cache in the cold
and warm boot paths. This required a DCIVAC cache maintenance operation to
invalidate any stale cache lines resident in other cpus.
This patch moves this initialization to the bl31_arch_setup() function
which is always called after the data cache and MMU has been enabled.
This change removes the need:
1. for the DCIVAC cache maintenance operation.
2. to initialise the CPU ops upon resumption from a PSCI CPU_SUSPEND
call since memory contents are always preserved in this case.
Change-Id: Ibb2fa2f7460d1a1f1e721242025e382734c204c6
-rw-r--r-- | bl31/aarch64/bl31_arch_setup.c | 4 | ||||
-rw-r--r-- | bl31/aarch64/bl31_entrypoint.S | 6 | ||||
-rw-r--r-- | include/bl31/cpu_data.h | 1 | ||||
-rw-r--r-- | lib/cpus/aarch64/cpu_helpers.S | 15 | ||||
-rw-r--r-- | services/std_svc/psci/psci_entry.S | 6 |
5 files changed, 7 insertions, 25 deletions
diff --git a/bl31/aarch64/bl31_arch_setup.c b/bl31/aarch64/bl31_arch_setup.c index a88b029ea..edf10188d 100644 --- a/bl31/aarch64/bl31_arch_setup.c +++ b/bl31/aarch64/bl31_arch_setup.c @@ -33,6 +33,7 @@ #include <assert.h> #include <bl_common.h> #include <bl31.h> +#include <cpu_data.h> #include <platform.h> /******************************************************************************* @@ -47,4 +48,7 @@ void bl31_arch_setup(void) /* Program the counter frequency */ write_cntfrq_el0(plat_get_syscnt_freq()); + + /* Initialize the cpu_ops pointer. */ + init_cpu_ops(); } diff --git a/bl31/aarch64/bl31_entrypoint.S b/bl31/aarch64/bl31_entrypoint.S index 01d7a7f53..186b1cbc2 100644 --- a/bl31/aarch64/bl31_entrypoint.S +++ b/bl31/aarch64/bl31_entrypoint.S @@ -162,12 +162,6 @@ func bl31_entrypoint #endif /* --------------------------------------------- - * Initialize the cpu_ops pointer. - * --------------------------------------------- - */ - bl init_cpu_ops - - /* --------------------------------------------- * Use SP_EL0 for the C runtime stack. * --------------------------------------------- */ diff --git a/include/bl31/cpu_data.h b/include/bl31/cpu_data.h index 1926e292a..50f509bbd 100644 --- a/include/bl31/cpu_data.h +++ b/include/bl31/cpu_data.h @@ -117,6 +117,7 @@ static inline struct cpu_data *_cpu_data(void) *************************************************************************/ void init_cpu_data_ptr(void); +void init_cpu_ops(void); #define get_cpu_data(_m) _cpu_data()->_m #define set_cpu_data(_m, _v) _cpu_data()->_m = _v diff --git a/lib/cpus/aarch64/cpu_helpers.S b/lib/cpus/aarch64/cpu_helpers.S index bebe7c0a5..24c283ab0 100644 --- a/lib/cpus/aarch64/cpu_helpers.S +++ b/lib/cpus/aarch64/cpu_helpers.S @@ -110,7 +110,8 @@ func prepare_cluster_pwr_dwn /* * Initializes the cpu_ops_ptr if not already initialized - * in cpu_data. This can be called without a runtime stack. + * in cpu_data. This can be called without a runtime stack, but may + * only be called after the MMU is enabled. * clobbers: x0 - x6, x10 */ .globl init_cpu_ops @@ -125,18 +126,6 @@ func init_cpu_ops ASM_ASSERT(ne) #endif str x0, [x6, #CPU_DATA_CPU_OPS_PTR]! - - /* - * Make sure that any pre-fetched cache copies are invalidated. - * Ensure that we are running with cache disable else we - * invalidate our own update. - */ -#if ASM_ASSERTION - mrs x1, sctlr_el3 - tst x1, #SCTLR_C_BIT - ASM_ASSERT(eq) -#endif - dc ivac, x6 mov x30, x10 1: ret diff --git a/services/std_svc/psci/psci_entry.S b/services/std_svc/psci/psci_entry.S index 3e67d3449..fb3f00761 100644 --- a/services/std_svc/psci/psci_entry.S +++ b/services/std_svc/psci/psci_entry.S @@ -87,12 +87,6 @@ psci_aff_common_finish_entry: bl init_cpu_data_ptr /* --------------------------------------------- - * Initialize the cpu_ops pointer. - * --------------------------------------------- - */ - bl init_cpu_ops - - /* --------------------------------------------- * Set the exception vectors * --------------------------------------------- */ |