From: rmallon@gmail.com (Ryan Mallon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 16/19] ARM: at91: merge SRAM Memory banks thanks to mirroring
Date: Thu, 23 Feb 2012 10:13:42 +1100 [thread overview]
Message-ID: <4F4576A6.3090901@gmail.com> (raw)
In-Reply-To: <0290a1a8c53da6ce02ef9b6f2447ba2da0859dc6.1329903206.git.nicolas.ferre@atmel.com>
On 22/02/12 20:39, Nicolas Ferre wrote:
> From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
>
> 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 <plagnioj@jcrosoft.com>
> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
> ---
> 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) */
Where does the SRAM_BASE value come from? The at91sam9g20 guide says
that the region 0x204000 - 0x2fffff is reserved, and I can't find any
information in the at91sam9g20 guide about the sram being mirrored. Can
you point me to some documentation for this?
~Ryan
next prev parent reply other threads:[~2012-02-22 23:13 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-22 9:39 [PATCH v2 00/19] at91 first cleanup series for 3.4 Nicolas Ferre
2012-02-22 9:39 ` [PATCH v2 01/19] ARM: at91: factorise duplicated at91sam9 idle Nicolas Ferre
2012-02-22 9:39 ` [PATCH v2 02/19] ARM: at91/at91x40: remove use of at91_sys_read/write Nicolas Ferre
2012-02-22 14:36 ` Arnd Bergmann
2012-02-22 16:26 ` Jean-Christophe PLAGNIOL-VILLARD
2012-02-22 22:22 ` Ryan Mallon
2012-02-23 3:25 ` Jean-Christophe PLAGNIOL-VILLARD
2012-02-23 3:59 ` Ryan Mallon
2012-02-23 6:01 ` Jean-Christophe PLAGNIOL-VILLARD
2012-02-23 9:23 ` Ryan Mallon
2012-02-22 9:39 ` [PATCH v2 03/19] ARM: at91: make matrix register base soc independent Nicolas Ferre
2012-02-22 22:17 ` Ryan Mallon
2012-02-23 3:26 ` Jean-Christophe PLAGNIOL-VILLARD
2012-02-22 9:39 ` [PATCH v2 04/19] ARM: at91: make ST (System Timer) " Nicolas Ferre
2012-02-22 22:24 ` Ryan Mallon
2012-02-22 9:39 ` [PATCH v2 05/19] ARM: at91/ST: remove not needed casts Nicolas Ferre
2012-02-22 22:24 ` Ryan Mallon
2012-02-22 9:39 ` [PATCH v2 06/19] ARM: at91/pm_slowclock: rename register to named define Nicolas Ferre
2012-02-22 9:50 ` Russell King - ARM Linux
2012-02-22 17:34 ` Jean-Christophe PLAGNIOL-VILLARD
2012-02-22 9:39 ` [PATCH v2 07/19] ARM: at91/pm_slowclock: function slow_clock() accepts parameters Nicolas Ferre
2012-02-22 9:52 ` Russell King - ARM Linux
2012-02-22 12:58 ` Jean-Christophe PLAGNIOL-VILLARD
2012-02-22 13:18 ` Russell King - ARM Linux
2012-02-22 13:57 ` Jean-Christophe PLAGNIOL-VILLARD
2012-02-22 9:39 ` [PATCH v2 08/19] ARM: at91: move at91rm9200 sdramc defines to at91rm9200_sdramc.h Nicolas Ferre
2012-02-22 9:39 ` [PATCH v2 09/19] ARM: at91: make sdram/ddr register base soc independent Nicolas Ferre
2012-02-22 22:33 ` Ryan Mallon
2012-02-23 8:56 ` Nicolas Ferre
2012-02-23 9:58 ` Nicolas Ferre
2012-02-23 10:51 ` Ryan Mallon
2012-02-23 13:47 ` Nicolas Ferre
2012-02-22 9:39 ` [PATCH v2 10/19] ARM: at91/pm_slowclock: add runtime detection of memory contoller Nicolas Ferre
2012-02-22 9:39 ` [PATCH v2 11/19] ARM: at91/PMC: make register base soc independent Nicolas Ferre
2012-02-22 22:50 ` Ryan Mallon
2012-02-23 8:38 ` Nicolas Ferre
2012-02-23 9:22 ` Ryan Mallon
2012-02-22 9:39 ` [PATCH v2 12/19] ARM: at91/rtc-at91sam9: each SoC can select the RTT device to use Nicolas Ferre
2012-02-22 14:50 ` Arnd Bergmann
2012-02-22 16:24 ` Jean-Christophe PLAGNIOL-VILLARD
2012-02-22 16:47 ` Arnd Bergmann
2012-02-22 17:07 ` Jean-Christophe PLAGNIOL-VILLARD
2012-02-22 17:25 ` Arnd Bergmann
2012-02-22 18:02 ` Jean-Christophe PLAGNIOL-VILLARD
2012-02-22 9:39 ` [PATCH v2 13/19] ARM: at91:rtc/rtc-at91sam9: ioremap register bank Nicolas Ferre
2012-02-22 9:39 ` [PATCH v2 14/19] ARM: at91/rtc-at91sam9: pass the GPBR to use via resources Nicolas Ferre
2012-02-22 9:39 ` [PATCH v2 15/19] ARM: at91: finally drop at91_sys_read/write Nicolas Ferre
2012-02-22 9:39 ` [PATCH v2 16/19] ARM: at91: merge SRAM Memory banks thanks to mirroring Nicolas Ferre
2012-02-22 23:13 ` Ryan Mallon [this message]
2012-02-23 3:28 ` Jean-Christophe PLAGNIOL-VILLARD
2012-02-22 9:39 ` [PATCH v2 17/19] Atmel: move console default platform_device to serial driver Nicolas Ferre
2012-02-22 9:39 ` [PATCH v2 18/19] ARM: at91/board-dt: drop default console Nicolas Ferre
2012-02-22 9:39 ` [PATCH v2 19/19] ARM: at91/board-dt: move at91_initialize() to init_irq() Nicolas Ferre
2012-02-22 9:48 ` Russell King - ARM Linux
2012-02-22 13:03 ` Jean-Christophe PLAGNIOL-VILLARD
2012-02-22 16:15 ` [PATCH 0/2] ARM: at91: two additional patches to cleanup series Nicolas Ferre
2012-02-22 16:15 ` [PATCH 1/2] ARM: at91: add at91sam9g25ek.dts in Makefile.boot Nicolas Ferre
2012-02-22 16:15 ` [PATCH 2/2] ARM: at91: properly sort dtb files " Nicolas Ferre
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