From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by casper.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1RXULJ-0006Uo-Ko for barebox@lists.infradead.org; Mon, 05 Dec 2011 08:56:11 +0000 From: Sascha Hauer Date: Mon, 5 Dec 2011 09:56:00 +0100 Message-Id: <1323075361-27455-5-git-send-email-s.hauer@pengutronix.de> In-Reply-To: <1323075361-27455-1-git-send-email-s.hauer@pengutronix.de> References: <1323075361-27455-1-git-send-email-s.hauer@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 4/5] register sdram as resources To: barebox@lists.infradead.org Also, request the sdram regions used by the barebox binary, bss, malloc space and stack. Signed-off-by: Sascha Hauer --- common/memory.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ include/memory.h | 5 ++++ 2 files changed, 63 insertions(+), 0 deletions(-) diff --git a/common/memory.c b/common/memory.c index 0ba9a18..7d0f4ca 100644 --- a/common/memory.c +++ b/common/memory.c @@ -25,6 +25,9 @@ #include #include #include +#include +#include +#include /* * Begin and End of memory area for malloc(), and current "brk" @@ -50,6 +53,33 @@ void mem_malloc_init(void *start, void *end) malloc_brk = malloc_start; } +static int mem_malloc_resource(void) +{ + /* + * Normally it's a bug when one of these fails, + * but we have some setups where some of these + * regions are outside of sdram in which case + * the following fails. + */ + request_sdram_region("malloc space", + malloc_start, + malloc_end - malloc_start + 1); + request_sdram_region("barebox", + (unsigned long)&_stext, + (unsigned long)&_etext - + (unsigned long)&_stext + 1); + request_sdram_region("bss", + (unsigned long)&__bss_start, + (unsigned long)&__bss_stop - + (unsigned long)&__bss_start + 1); +#ifdef STACK_BASE + request_sdram_region("stack", STACK_BASE, STACK_SIZE); +#endif + + return 0; +} +coredevice_initcall(mem_malloc_resource); + static void *sbrk_no_zero(ptrdiff_t increment) { unsigned long old = malloc_brk; @@ -82,6 +112,10 @@ void barebox_add_memory_bank(const char *name, resource_size_t start, struct memory_bank *bank = xzalloc(sizeof(*bank)); struct device_d *dev; + bank->res = request_iomem_region(name, start, size); + + BUG_ON(!bank->res); + dev = add_mem_device(name, start, size, IORESOURCE_MEM_WRITEABLE); bank->dev = dev; @@ -91,6 +125,30 @@ void barebox_add_memory_bank(const char *name, resource_size_t start, list_add_tail(&bank->list, &memory_banks); } +/* + * Request a region from the registered sdram + */ +struct resource *request_sdram_region(const char *name, resource_size_t start, + resource_size_t size) +{ + struct memory_bank *bank; + + for_each_memory_bank(bank) { + struct resource *res; + + res = request_region(bank->res, name, start, size); + if (res) + return res; + } + + return NULL; +} + +int release_sdram_region(struct resource *res) +{ + return release_region(res); +} + #ifdef CONFIG_OFTREE /* diff --git a/include/memory.h b/include/memory.h index cb185af..4be4340 100644 --- a/include/memory.h +++ b/include/memory.h @@ -13,6 +13,7 @@ struct memory_bank { struct device_d *dev; unsigned long start; unsigned long size; + struct resource *res; }; extern struct list_head memory_banks; @@ -22,4 +23,8 @@ void barebox_add_memory_bank(const char *name, resource_size_t start, #define for_each_memory_bank(mem) list_for_each_entry(mem, &memory_banks, list) +struct resource *request_sdram_region(const char *name, resource_size_t start, + resource_size_t size); +int release_sdram_region(struct resource *res); + #endif -- 1.7.7.3 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox