diff options
author | Dinh Nguyen <dinguyen@altera.com> | 2013-02-11 23:30:32 (GMT) |
---|---|---|
committer | Olof Johansson <olof@lixom.net> | 2013-02-12 03:37:24 (GMT) |
commit | c08e20d246ded319fc77616c64dcbf69456cb4be (patch) | |
tree | 0858e1ba5ccb0fa76cdd52f039d2fb3e2cb9f333 /arch | |
parent | 90c294557d411100d3557bc2762a98a93f989430 (diff) | |
download | linux-fsl-qoriq-c08e20d246ded319fc77616c64dcbf69456cb4be.tar.xz |
arm: Add v7_invalidate_l1 to cache-v7.S
mach-socfpga is another platform that needs to use
v7_invalidate_l1 to bringup additional cores. There was a comment that
the ideal place for v7_invalidate_l1 should be in arm/mm/cache-v7.S
Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Pavel Machek <pavel@denx.de>
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Pavel Machek <pavel@denx.de>
Tested-by: Stephen Warren <swarren@nvidia.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Olof Johansson <olof@lixom.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Magnus Damm <magnus.damm@gmail.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/arm/mach-imx/headsmp.S | 47 | ||||
-rw-r--r-- | arch/arm/mach-shmobile/headsmp.S | 48 | ||||
-rw-r--r-- | arch/arm/mach-tegra/headsmp.S | 43 | ||||
-rw-r--r-- | arch/arm/mm/cache-v7.S | 46 |
4 files changed, 46 insertions, 138 deletions
diff --git a/arch/arm/mach-imx/headsmp.S b/arch/arm/mach-imx/headsmp.S index 7e49deb..921fc15 100644 --- a/arch/arm/mach-imx/headsmp.S +++ b/arch/arm/mach-imx/headsmp.S @@ -17,53 +17,6 @@ .section ".text.head", "ax" -/* - * The secondary kernel init calls v7_flush_dcache_all before it enables - * the L1; however, the L1 comes out of reset in an undefined state, so - * the clean + invalidate performed by v7_flush_dcache_all causes a bunch - * of cache lines with uninitialized data and uninitialized tags to get - * written out to memory, which does really unpleasant things to the main - * processor. We fix this by performing an invalidate, rather than a - * clean + invalidate, before jumping into the kernel. - * - * This funciton is cloned from arch/arm/mach-tegra/headsmp.S, and needs - * to be called for both secondary cores startup and primary core resume - * procedures. Ideally, it should be moved into arch/arm/mm/cache-v7.S. - */ -ENTRY(v7_invalidate_l1) - mov r0, #0 - mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache - mcr p15, 2, r0, c0, c0, 0 - mrc p15, 1, r0, c0, c0, 0 - - ldr r1, =0x7fff - and r2, r1, r0, lsr #13 - - ldr r1, =0x3ff - - and r3, r1, r0, lsr #3 @ NumWays - 1 - add r2, r2, #1 @ NumSets - - and r0, r0, #0x7 - add r0, r0, #4 @ SetShift - - clz r1, r3 @ WayShift - add r4, r3, #1 @ NumWays -1: sub r2, r2, #1 @ NumSets-- - mov r3, r4 @ Temp = NumWays -2: subs r3, r3, #1 @ Temp-- - mov r5, r3, lsl r1 - mov r6, r2, lsl r0 - orr r5, r5, r6 @ Reg = (Temp<<WayShift)|(NumSets<<SetShift) - mcr p15, 0, r5, c7, c6, 2 - bgt 2b - cmp r2, #0 - bgt 1b - dsb - isb - mov pc, lr -ENDPROC(v7_invalidate_l1) - #ifdef CONFIG_SMP ENTRY(v7_secondary_startup) bl v7_invalidate_l1 diff --git a/arch/arm/mach-shmobile/headsmp.S b/arch/arm/mach-shmobile/headsmp.S index b202c12..96001fd 100644 --- a/arch/arm/mach-shmobile/headsmp.S +++ b/arch/arm/mach-shmobile/headsmp.S @@ -16,54 +16,6 @@ __CPUINIT -/* Cache invalidation nicked from arch/arm/mach-imx/head-v7.S, thanks! - * - * The secondary kernel init calls v7_flush_dcache_all before it enables - * the L1; however, the L1 comes out of reset in an undefined state, so - * the clean + invalidate performed by v7_flush_dcache_all causes a bunch - * of cache lines with uninitialized data and uninitialized tags to get - * written out to memory, which does really unpleasant things to the main - * processor. We fix this by performing an invalidate, rather than a - * clean + invalidate, before jumping into the kernel. - * - * This funciton is cloned from arch/arm/mach-tegra/headsmp.S, and needs - * to be called for both secondary cores startup and primary core resume - * procedures. Ideally, it should be moved into arch/arm/mm/cache-v7.S. - */ -ENTRY(v7_invalidate_l1) - mov r0, #0 - mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache - mcr p15, 2, r0, c0, c0, 0 - mrc p15, 1, r0, c0, c0, 0 - - ldr r1, =0x7fff - and r2, r1, r0, lsr #13 - - ldr r1, =0x3ff - - and r3, r1, r0, lsr #3 @ NumWays - 1 - add r2, r2, #1 @ NumSets - - and r0, r0, #0x7 - add r0, r0, #4 @ SetShift - - clz r1, r3 @ WayShift - add r4, r3, #1 @ NumWays -1: sub r2, r2, #1 @ NumSets-- - mov r3, r4 @ Temp = NumWays -2: subs r3, r3, #1 @ Temp-- - mov r5, r3, lsl r1 - mov r6, r2, lsl r0 - orr r5, r5, r6 @ Reg = (Temp<<WayShift)|(NumSets<<SetShift) - mcr p15, 0, r5, c7, c6, 2 - bgt 2b - cmp r2, #0 - bgt 1b - dsb - isb - mov pc, lr -ENDPROC(v7_invalidate_l1) - ENTRY(shmobile_invalidate_start) bl v7_invalidate_l1 b secondary_startup diff --git a/arch/arm/mach-tegra/headsmp.S b/arch/arm/mach-tegra/headsmp.S index 4a317fa..fb082c4 100644 --- a/arch/arm/mach-tegra/headsmp.S +++ b/arch/arm/mach-tegra/headsmp.S @@ -18,49 +18,6 @@ .section ".text.head", "ax" __CPUINIT -/* - * Tegra specific entry point for secondary CPUs. - * The secondary kernel init calls v7_flush_dcache_all before it enables - * the L1; however, the L1 comes out of reset in an undefined state, so - * the clean + invalidate performed by v7_flush_dcache_all causes a bunch - * of cache lines with uninitialized data and uninitialized tags to get - * written out to memory, which does really unpleasant things to the main - * processor. We fix this by performing an invalidate, rather than a - * clean + invalidate, before jumping into the kernel. - */ -ENTRY(v7_invalidate_l1) - mov r0, #0 - mcr p15, 2, r0, c0, c0, 0 - mrc p15, 1, r0, c0, c0, 0 - - ldr r1, =0x7fff - and r2, r1, r0, lsr #13 - - ldr r1, =0x3ff - - and r3, r1, r0, lsr #3 @ NumWays - 1 - add r2, r2, #1 @ NumSets - - and r0, r0, #0x7 - add r0, r0, #4 @ SetShift - - clz r1, r3 @ WayShift - add r4, r3, #1 @ NumWays -1: sub r2, r2, #1 @ NumSets-- - mov r3, r4 @ Temp = NumWays -2: subs r3, r3, #1 @ Temp-- - mov r5, r3, lsl r1 - mov r6, r2, lsl r0 - orr r5, r5, r6 @ Reg = (Temp<<WayShift)|(NumSets<<SetShift) - mcr p15, 0, r5, c7, c6, 2 - bgt 2b - cmp r2, #0 - bgt 1b - dsb - isb - mov pc, lr -ENDPROC(v7_invalidate_l1) - ENTRY(tegra_secondary_startup) bl v7_invalidate_l1 diff --git a/arch/arm/mm/cache-v7.S b/arch/arm/mm/cache-v7.S index 7539ec2..15451ee 100644 --- a/arch/arm/mm/cache-v7.S +++ b/arch/arm/mm/cache-v7.S @@ -19,6 +19,52 @@ #include "proc-macros.S" /* + * The secondary kernel init calls v7_flush_dcache_all before it enables + * the L1; however, the L1 comes out of reset in an undefined state, so + * the clean + invalidate performed by v7_flush_dcache_all causes a bunch + * of cache lines with uninitialized data and uninitialized tags to get + * written out to memory, which does really unpleasant things to the main + * processor. We fix this by performing an invalidate, rather than a + * clean + invalidate, before jumping into the kernel. + * + * This function is cloned from arch/arm/mach-tegra/headsmp.S, and needs + * to be called for both secondary cores startup and primary core resume + * procedures. + */ +ENTRY(v7_invalidate_l1) + mov r0, #0 + mcr p15, 2, r0, c0, c0, 0 + mrc p15, 1, r0, c0, c0, 0 + + ldr r1, =0x7fff + and r2, r1, r0, lsr #13 + + ldr r1, =0x3ff + + and r3, r1, r0, lsr #3 @ NumWays - 1 + add r2, r2, #1 @ NumSets + + and r0, r0, #0x7 + add r0, r0, #4 @ SetShift + + clz r1, r3 @ WayShift + add r4, r3, #1 @ NumWays +1: sub r2, r2, #1 @ NumSets-- + mov r3, r4 @ Temp = NumWays +2: subs r3, r3, #1 @ Temp-- + mov r5, r3, lsl r1 + mov r6, r2, lsl r0 + orr r5, r5, r6 @ Reg = (Temp<<WayShift)|(NumSets<<SetShift) + mcr p15, 0, r5, c7, c6, 2 + bgt 2b + cmp r2, #0 + bgt 1b + dsb + isb + mov pc, lr +ENDPROC(v7_invalidate_l1) + +/* * v7_flush_icache_all() * * Flush the whole I-cache. |