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Commit b83d6ee1 authored by Haavard Skinnemoen's avatar Haavard Skinnemoen Committed by Haavard Skinnemoen
Browse files

avr32: Add simple SRAM allocator 



Add SRAM allocator for avr32, which is just a thin wrapper around
genalloc.

Signed-off-by: default avatarHaavard Skinnemoen <hskinnemoen@atmel.com>
parent 7951f188

arch/avr32/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -88,6 +88,7 @@ config PLATFORM_AT32AP 
	select MMU

	select PERFORMANCE_COUNTERS

	select HAVE_GPIO_LIB

	select GENERIC_ALLOCATOR



#

# CPU types

arch/avr32/mach-at32ap/at32ap700x.c

+26 −0
Original line number Diff line number Diff line
@@ -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);

include/asm-avr32/arch-at32ap/sram.h

0 → 100644
+30 −0
Original line number Diff line number Diff line 
/*

 * 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 */