[PATCH 15/18] ARM: at91: merge SRAM Memory banks thanks to mirroring
From: Nicolas Ferre <hidden>
Date: 2012-02-17 17:53:38
Also in:
lkml
Subsystem:
arm port, arm/microchip (at91) soc support, the rest · Maintainers:
Russell King, Nicolas Ferre, Alexandre Belloni, Claudiu Beznea, Linus Torvalds
From: Jean-Christophe PLAGNIOL-VILLARD <redacted> On at91sam9260 and at91sam9g20 the SRAM banks are mirrored. We can merge them together to be able to have bigger and continuous internal RAM. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <redacted> Acked-by: Nicolas Ferre <redacted> --- arch/arm/mach-at91/at91sam9260.c | 13 +++++-------- arch/arm/mach-at91/include/mach/at91sam9260.h | 4 ++++ 2 files changed, 9 insertions(+), 8 deletions(-)
diff --git a/arch/arm/mach-at91/at91sam9260.c b/arch/arm/mach-at91/at91sam9260.c
index 14882ae..4ade265 100644
--- a/arch/arm/mach-at91/at91sam9260.c
+++ b/arch/arm/mach-at91/at91sam9260.c@@ -310,15 +310,12 @@ static void __init at91sam9xe_map_io(void) static void __init at91sam9260_map_io(void) { - if (cpu_is_at91sam9xe()) { + if (cpu_is_at91sam9xe()) at91sam9xe_map_io(); - } else if (cpu_is_at91sam9g20()) { - at91_init_sram(0, AT91SAM9G20_SRAM0_BASE, AT91SAM9G20_SRAM0_SIZE); - at91_init_sram(1, AT91SAM9G20_SRAM1_BASE, AT91SAM9G20_SRAM1_SIZE); - } else { - at91_init_sram(0, AT91SAM9260_SRAM0_BASE, AT91SAM9260_SRAM0_SIZE); - at91_init_sram(1, AT91SAM9260_SRAM1_BASE, AT91SAM9260_SRAM1_SIZE); - } + else if (cpu_is_at91sam9g20()) + at91_init_sram(0, AT91SAM9G20_SRAM_BASE, AT91SAM9G20_SRAM_SIZE); + else + at91_init_sram(0, AT91SAM9260_SRAM_BASE, AT91SAM9260_SRAM_SIZE); } static void __init at91sam9260_ioremap_registers(void)
diff --git a/arch/arm/mach-at91/include/mach/at91sam9260.h b/arch/arm/mach-at91/include/mach/at91sam9260.h
index 2e47b6d..08ae9af 100644
--- a/arch/arm/mach-at91/include/mach/at91sam9260.h
+++ b/arch/arm/mach-at91/include/mach/at91sam9260.h@@ -113,6 +113,8 @@ #define AT91SAM9260_SRAM0_SIZE SZ_4K /* Internal SRAM 0 size (4Kb) */ #define AT91SAM9260_SRAM1_BASE 0x00300000 /* Internal SRAM 1 base address */ #define AT91SAM9260_SRAM1_SIZE SZ_4K /* Internal SRAM 1 size (4Kb) */ +#define AT91SAM9260_SRAM_BASE 0x002FF000 /* Internal SRAM base address */ +#define AT91SAM9260_SRAM_SIZE SZ_8K /* Internal SRAM size (8Kb) */ #define AT91SAM9260_UHP_BASE 0x00500000 /* USB Host controller */
@@ -126,6 +128,8 @@ #define AT91SAM9G20_SRAM0_SIZE SZ_16K /* Internal SRAM 0 size (16Kb) */ #define AT91SAM9G20_SRAM1_BASE 0x00300000 /* Internal SRAM 1 base address */ #define AT91SAM9G20_SRAM1_SIZE SZ_16K /* Internal SRAM 1 size (16Kb) */ +#define AT91SAM9G20_SRAM_BASE 0x002FC000 /* Internal SRAM base address */ +#define AT91SAM9G20_SRAM_SIZE SZ_32K /* Internal SRAM size (32Kb) */ #define AT91SAM9G20_UHP_BASE 0x00500000 /* USB Host controller */
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1.7.9