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author | Frederic Weisbecker <fweisbec@gmail.com> | 2009-10-18 01:09:09 +0200 |
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committer | Frederic Weisbecker <fweisbec@gmail.com> | 2009-10-18 01:12:33 +0200 |
commit | 0f8f86c7bdd1c954fbe153af437a0d91a6c5721a (patch) | |
tree | 94a8d419a470a4f9852ca397bb9bbe48db92ff5c /arch/powerpc/sysdev/mmio_nvram.c | |
parent | Merge branch 'linus' into tracing/hw-breakpoints (diff) | |
parent | perf tools: Move dereference after NULL test (diff) | |
download | linux-dev-0f8f86c7bdd1c954fbe153af437a0d91a6c5721a.tar.xz linux-dev-0f8f86c7bdd1c954fbe153af437a0d91a6c5721a.zip |
Merge commit 'perf/core' into perf/hw-breakpoint
Conflicts:
kernel/Makefile
kernel/trace/Makefile
kernel/trace/trace.h
samples/Makefile
Merge reason: We need to be uptodate with the perf events development
branch because we plan to rewrite the breakpoints API on top of
perf events.
Diffstat (limited to 'arch/powerpc/sysdev/mmio_nvram.c')
-rw-r--r-- | arch/powerpc/sysdev/mmio_nvram.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/mmio_nvram.c b/arch/powerpc/sysdev/mmio_nvram.c index 7b49633a4bd0..207324209065 100644 --- a/arch/powerpc/sysdev/mmio_nvram.c +++ b/arch/powerpc/sysdev/mmio_nvram.c @@ -53,6 +53,23 @@ static ssize_t mmio_nvram_read(char *buf, size_t count, loff_t *index) return count; } +static unsigned char mmio_nvram_read_val(int addr) +{ + unsigned long flags; + unsigned char val; + + if (addr >= mmio_nvram_len) + return 0xff; + + spin_lock_irqsave(&mmio_nvram_lock, flags); + + val = ioread8(mmio_nvram_start + addr); + + spin_unlock_irqrestore(&mmio_nvram_lock, flags); + + return val; +} + static ssize_t mmio_nvram_write(char *buf, size_t count, loff_t *index) { unsigned long flags; @@ -72,6 +89,19 @@ static ssize_t mmio_nvram_write(char *buf, size_t count, loff_t *index) return count; } +void mmio_nvram_write_val(int addr, unsigned char val) +{ + unsigned long flags; + + if (addr < mmio_nvram_len) { + spin_lock_irqsave(&mmio_nvram_lock, flags); + + iowrite8(val, mmio_nvram_start + addr); + + spin_unlock_irqrestore(&mmio_nvram_lock, flags); + } +} + static ssize_t mmio_nvram_get_size(void) { return mmio_nvram_len; @@ -114,6 +144,8 @@ int __init mmio_nvram_init(void) printk(KERN_INFO "mmio NVRAM, %luk at 0x%lx mapped to %p\n", mmio_nvram_len >> 10, nvram_addr, mmio_nvram_start); + ppc_md.nvram_read_val = mmio_nvram_read_val; + ppc_md.nvram_write_val = mmio_nvram_write_val; ppc_md.nvram_read = mmio_nvram_read; ppc_md.nvram_write = mmio_nvram_write; ppc_md.nvram_size = mmio_nvram_get_size; |