diff options
| author | Haavard Skinnemoen <hskinnemoen@atmel.com> | 2008-03-05 10:00:28 +0100 |
|---|---|---|
| committer | Haavard Skinnemoen <haavard.skinnemoen@atmel.com> | 2008-07-02 11:05:01 +0200 |
| commit | b83d6ee17588f1a4fbfc8ef0451b0900a5ef5950 (patch) | |
| tree | bde2ffd7f1ad14d8a6f15300a8e0d7b36224bbc9 | |
| parent | 7951f188a0b7f9b2f181c692efb0d31082bec346 (diff) | |
avr32: Add simple SRAM allocator
Add SRAM allocator for avr32, which is just a thin wrapper around
genalloc.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
| -rw-r--r-- | arch/avr32/Kconfig | 1 | ||||
| -rw-r--r-- | arch/avr32/mach-at32ap/at32ap700x.c | 26 | ||||
| -rw-r--r-- | include/asm-avr32/arch-at32ap/sram.h | 30 |
3 files changed, 57 insertions, 0 deletions
diff --git a/arch/avr32/Kconfig b/arch/avr32/Kconfig index a5793c13f50c..e8ee5fa017b6 100644 --- a/arch/avr32/Kconfig +++ b/arch/avr32/Kconfig @@ -88,6 +88,7 @@ config PLATFORM_AT32AP select MMU select PERFORMANCE_COUNTERS select HAVE_GPIO_LIB + select GENERIC_ALLOCATOR # # CPU types diff --git a/arch/avr32/mach-at32ap/at32ap700x.c b/arch/avr32/mach-at32ap/at32ap700x.c index 3ee5e7278790..07b21b121eef 100644 --- a/arch/avr32/mach-at32ap/at32ap700x.c +++ b/arch/avr32/mach-at32ap/at32ap700x.c @@ -20,6 +20,7 @@ #include <asm/arch/at32ap700x.h> #include <asm/arch/board.h> #include <asm/arch/portmux.h> +#include <asm/arch/sram.h> #include <video/atmel_lcdc.h> @@ -2120,3 +2121,28 @@ void __init setup_platform(void) at32_init_pio(&pio3_device); at32_init_pio(&pio4_device); } + +struct gen_pool *sram_pool; + +static int __init sram_init(void) +{ + struct gen_pool *pool; + + /* 1KiB granularity */ + pool = gen_pool_create(10, -1); + if (!pool) + goto fail; + + if (gen_pool_add(pool, 0x24000000, 0x8000, -1)) + goto err_pool_add; + + sram_pool = pool; + return 0; + +err_pool_add: + gen_pool_destroy(pool); +fail: + pr_err("Failed to create SRAM pool\n"); + return -ENOMEM; +} +core_initcall(sram_init); diff --git a/include/asm-avr32/arch-at32ap/sram.h b/include/asm-avr32/arch-at32ap/sram.h new file mode 100644 index 000000000000..4838dae7601a --- /dev/null +++ b/include/asm-avr32/arch-at32ap/sram.h @@ -0,0 +1,30 @@ +/* + * Simple SRAM allocator + * + * Copyright (C) 2008 Atmel Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef __ASM_AVR32_ARCH_SRAM_H +#define __ASM_AVR32_ARCH_SRAM_H + +#include <linux/genalloc.h> + +extern struct gen_pool *sram_pool; + +static inline unsigned long sram_alloc(size_t len) +{ + if (!sram_pool) + return 0UL; + + return gen_pool_alloc(sram_pool, len); +} + +static inline void sram_free(unsigned long addr, size_t len) +{ + return gen_pool_free(sram_pool, addr, len); +} + +#endif /* __ASM_AVR32_ARCH_SRAM_H */ |