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authorJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>2011-05-10 03:20:09 +0800
committerArnd Bergmann <arnd@arndb.de>2011-07-28 15:07:29 +0000
commitf0051d82a68abcf35418d49db1c82e6f0e514d78 (patch)
tree5a14645bdefe2a3c4671f456d4eb6595956c68ca /arch/arm/mach-at91/setup.c
parent51ddec7617bd0d4c73c44a8862faac5d7d97eb03 (diff)
at91: factorize sram init
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Patrice Vilchez <patrice.vilchez@atmel.com>
Diffstat (limited to 'arch/arm/mach-at91/setup.c')
-rw-r--r--arch/arm/mach-at91/setup.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm/mach-at91/setup.c b/arch/arm/mach-at91/setup.c
index 43251efd90d4..816599fce55b 100644
--- a/arch/arm/mach-at91/setup.c
+++ b/arch/arm/mach-at91/setup.c
@@ -45,6 +45,26 @@ void __init at91_init_interrupts(unsigned int *priority)
at91_gpio_irq_setup();
}
+static struct map_desc sram_desc[2] __initdata;
+
+void __init at91_init_sram(int bank, unsigned long base, unsigned int length)
+{
+ struct map_desc *desc = &sram_desc[bank];
+
+ desc->virtual = AT91_IO_VIRT_BASE - length;
+ if (bank > 0)
+ desc->virtual -= sram_desc[bank - 1].length;
+
+ desc->pfn = __phys_to_pfn(base);
+ desc->length = length;
+ desc->type = MT_DEVICE;
+
+ pr_info("AT91: sram at 0x%lx of 0x%x mapped at 0x%lx\n",
+ base, length, desc->virtual);
+
+ iotable_init(desc, 1);
+}
+
static struct map_desc at91_io_desc __initdata = {
.virtual = AT91_VA_BASE_SYS,
.pfn = __phys_to_pfn(AT91_BASE_SYS),