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authorNishanth Menon <nm@ti.com>2015-03-09 17:12:09 -0500
committerTom Rini <trini@konsulko.com>2015-03-13 09:29:33 -0400
commitcdef0b3f3ae56db2acd0a79c3a4089db281378fe (patch)
treea588234fba95d3b76243ccfbd89559844b680f13 /arch
parentc6f90e1418a84fe5fa463b38403bd1845cb6a59c (diff)
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ARM: OMAP3: rx51: Enable workaround for ARM errata 454179, 430973, 621766
RX51 has a secure logic which uses different parameters compared to traditional implementation. So, make the generic secure acr write over-ride-able by board file and refactor rx51 code to use this. While at it, enable the OMAP3 specific errata code for 454179, 430973, 621766. Signed-off-by: Nishanth Menon <nm@ti.com> Reviewed-by: Tom Rini <trini@konsulko.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/cpu/armv7/omap3/board.c45
-rw-r--r--arch/arm/include/asm/arch-omap3/sys_proto.h1
2 files changed, 21 insertions, 25 deletions
diff --git a/arch/arm/cpu/armv7/omap3/board.c b/arch/arm/cpu/armv7/omap3/board.c
index 51a1c58..b064c0c 100644
--- a/arch/arm/cpu/armv7/omap3/board.c
+++ b/arch/arm/cpu/armv7/omap3/board.c
@@ -415,31 +415,30 @@ static void omap3_emu_romcode_call(u32 service_id, u32 *parameters)
do_omap3_emu_romcode_call(service_id, OMAP3_PUBLIC_SRAM_SCRATCH_AREA);
}
-void v7_arch_cp15_set_acr(u32 acr, u32 cpu_midr, u32 cpu_rev_comb,
- u32 cpu_variant, u32 cpu_rev)
+void __weak omap3_set_aux_cr_secure(u32 acr)
{
- if (get_device_type() == GP_DEVICE) {
- omap_smc1(OMAP3_GP_ROMCODE_API_WRITE_ACR, acr);
- } else {
- struct emu_hal_params emu_romcode_params;
- emu_romcode_params.num_params = 1;
- emu_romcode_params.param1 = acr;
- omap3_emu_romcode_call(OMAP3_EMU_HAL_API_WRITE_ACR,
- (u32 *)&emu_romcode_params);
- }
+ struct emu_hal_params emu_romcode_params;
+
+ emu_romcode_params.num_params = 1;
+ emu_romcode_params.param1 = acr;
+ omap3_emu_romcode_call(OMAP3_EMU_HAL_API_WRITE_ACR,
+ (u32 *)&emu_romcode_params);
}
-static void omap3_update_aux_cr_secure(u32 set_bits, u32 clear_bits)
+void v7_arch_cp15_set_acr(u32 acr, u32 cpu_midr, u32 cpu_rev_comb,
+ u32 cpu_variant, u32 cpu_rev)
{
- u32 acr;
+ /* Write ACR - affects secure banked bits */
+ if (get_device_type() == GP_DEVICE)
+ omap_smc1(OMAP3_GP_ROMCODE_API_WRITE_ACR, acr);
+ else
+ omap3_set_aux_cr_secure(acr);
- /* Read ACR */
- asm volatile ("mrc p15, 0, %0, c1, c0, 1" : "=r" (acr));
- acr &= ~clear_bits;
- acr |= set_bits;
- v7_arch_cp15_set_acr(acr, 0, 0, 0, 0);
+ /* Write ACR - affects non-secure banked bits - some erratas need it */
+ asm volatile ("mcr p15, 0, %0, c1, c0, 1" : : "r" (acr));
}
+
#ifndef CONFIG_SYS_L2CACHE_OFF
static void omap3_update_aux_cr(u32 set_bits, u32 clear_bits)
{
@@ -449,9 +448,8 @@ static void omap3_update_aux_cr(u32 set_bits, u32 clear_bits)
asm volatile ("mrc p15, 0, %0, c1, c0, 1" : "=r" (acr));
acr &= ~clear_bits;
acr |= set_bits;
+ v7_arch_cp15_set_acr(acr, 0, 0, 0, 0);
- /* Write ACR - affects non-secure banked bits */
- asm volatile ("mcr p15, 0, %0, c1, c0, 1" : : "r" (acr));
}
/* Invalidate the entire L2 cache from secure mode */
@@ -470,10 +468,9 @@ static void omap3_invalidate_l2_cache_secure(void)
void v7_outer_cache_enable(void)
{
- /* Set L2EN */
- omap3_update_aux_cr_secure(0x2, 0);
/*
+ * Set L2EN
* On some revisions L2EN bit is banked on some revisions it's not
* No harm in setting both banked bits(in fact this is required
* by an erratum)
@@ -483,10 +480,8 @@ void v7_outer_cache_enable(void)
void omap3_outer_cache_disable(void)
{
- /* Clear L2EN */
- omap3_update_aux_cr_secure(0, 0x2);
-
/*
+ * Clear L2EN
* On some revisions L2EN bit is banked on some revisions it's not
* No harm in clearing both banked bits(in fact this is required
* by an erratum)
diff --git a/arch/arm/include/asm/arch-omap3/sys_proto.h b/arch/arm/include/asm/arch-omap3/sys_proto.h
index 0c77a22..3e45ce1 100644
--- a/arch/arm/include/asm/arch-omap3/sys_proto.h
+++ b/arch/arm/include/asm/arch-omap3/sys_proto.h
@@ -73,5 +73,6 @@ void power_init_r(void);
void dieid_num_r(void);
void get_dieid(u32 *id);
void do_omap3_emu_romcode_call(u32 service_id, u32 parameters);
+void omap3_set_aux_cr_secure(u32 acr);
u32 warm_reset(void);
#endif