diff options
| author | Mike Frysinger <vapier.adi@gmail.com> | 2008-08-14 08:29:57 +0200 |
|---|---|---|
| committer | Bryan Wu <cooloney@kernel.org> | 2008-08-14 08:29:57 +0200 |
| commit | 0e06b50dda5965e0f8a15b0be14b759ead54fd2a (patch) | |
| tree | 3b0bf1ba71ba8799e55a7670d8572615443c0ba5 /arch | |
| parent | Blackfin arch: workaround SIC_IWR1 reset bug, by keeping MDMA0/1 always enabl... (diff) | |
| download | linux-0e06b50dda5965e0f8a15b0be14b759ead54fd2a.tar.xz linux-0e06b50dda5965e0f8a15b0be14b759ead54fd2a.zip | |
Blackfin arch: cleanup cache lock code
- remove cheesy read_iloc() function
- move invalidate_entire_icache function to lock.S
- export proper prototypes for functions in lock.S
- only build lock.S when BFIN_ICACHE_LOCK is enabled
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/blackfin/kernel/setup.c | 2 | ||||
| -rw-r--r-- | arch/blackfin/mach-common/Makefile | 3 | ||||
| -rw-r--r-- | arch/blackfin/mach-common/lock.S | 45 |
3 files changed, 34 insertions, 16 deletions
diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c index 936c06d820de..2ae84fea89eb 100644 --- a/arch/blackfin/kernel/setup.c +++ b/arch/blackfin/kernel/setup.c @@ -1059,7 +1059,7 @@ static int show_cpuinfo(struct seq_file *m, void *v) dsup_banks, BFIN_DSUBBANKS, BFIN_DWAYS, BFIN_DLINES); #ifdef CONFIG_BFIN_ICACHE_LOCK - switch (read_iloc()) { + switch ((bfin_read_IMEM_CONTROL() >> 3) & WAYALL_L) { case WAY0_L: seq_printf(m, "Way0 Locked-Down\n"); break; diff --git a/arch/blackfin/mach-common/Makefile b/arch/blackfin/mach-common/Makefile index 862cd73c9504..e6ed57c56d4b 100644 --- a/arch/blackfin/mach-common/Makefile +++ b/arch/blackfin/mach-common/Makefile @@ -4,8 +4,9 @@ obj-y := \ cache.o entry.o head.o \ - interrupt.o lock.o irqpanic.o arch_checks.o ints-priority.o + interrupt.o irqpanic.o arch_checks.o ints-priority.o +obj-$(CONFIG_BFIN_ICACHE_LOCK) += lock.o obj-$(CONFIG_PM) += pm.o dpmc_modes.o obj-$(CONFIG_CPU_FREQ) += cpufreq.o obj-$(CONFIG_CPU_VOLTAGE) += dpmc.o diff --git a/arch/blackfin/mach-common/lock.S b/arch/blackfin/mach-common/lock.S index 30b887e67dd6..9daf01201e9f 100644 --- a/arch/blackfin/mach-common/lock.S +++ b/arch/blackfin/mach-common/lock.S @@ -28,13 +28,10 @@ */ #include <linux/linkage.h> -#include <asm/cplb.h> #include <asm/blackfin.h> .text -#ifdef CONFIG_BFIN_ICACHE_LOCK - /* When you come here, it is assumed that * R0 - Which way to be locked */ @@ -189,18 +186,38 @@ ENTRY(_cache_lock) RTS; ENDPROC(_cache_lock) -#endif /* BFIN_ICACHE_LOCK */ - -/* Return the ILOC bits of IMEM_CONTROL +/* Invalidate the Entire Instruction cache by + * disabling IMC bit */ +ENTRY(_invalidate_entire_icache) + [--SP] = ( R7:5); -ENTRY(_read_iloc) - P1.H = HI(IMEM_CONTROL); - P1.L = LO(IMEM_CONTROL); - R1 = 0xF; - R0 = [P1]; - R0 = R0 >> 3; - R0 = R0 & R1; + P0.L = LO(IMEM_CONTROL); + P0.H = HI(IMEM_CONTROL); + R7 = [P0]; + + /* Clear the IMC bit , All valid bits in the instruction + * cache are set to the invalid state + */ + BITCLR(R7,IMC_P); + CLI R6; + SSYNC; /* SSYNC required before invalidating cache. */ + .align 8; + [P0] = R7; + SSYNC; + STI R6; + + /* Configures the instruction cache agian */ + R6 = (IMC | ENICPLB); + R7 = R7 | R6; + + CLI R6; + SSYNC; /* SSYNC required before writing to IMEM_CONTROL. */ + .align 8; + [P0] = R7; + SSYNC; + STI R6; + ( R7:5) = [SP++]; RTS; -ENDPROC(_read_iloc) +ENDPROC(_invalidate_entire_icache) |