Commit 2e2c9de2 authored by Russell King's avatar Russell King
Browse files

ARM: add permission annotations to MT_MEMORY* mapping types 



Document the permissions which the various MT_MEMORY* mapping types
will provide.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 1fd15b87

arch/arm/include/asm/mach/map.h

+14 −12
Original line number Diff line number Diff line
@@ -22,18 +22,20 @@ struct map_desc { 
};



/* types 0-3 are defined in asm/io.h */

#define MT_UNCACHED		4

#define MT_CACHECLEAN		5

#define MT_MINICLEAN		6

#define MT_LOW_VECTORS		7

#define MT_HIGH_VECTORS		8

#define MT_MEMORY		9

#define MT_ROM			10

#define MT_MEMORY_NONCACHED	11

#define MT_MEMORY_DTCM		12

#define MT_MEMORY_ITCM		13

#define MT_MEMORY_SO		14

#define MT_MEMORY_DMA_READY	15

enum {

	MT_UNCACHED = 4,

	MT_CACHECLEAN,

	MT_MINICLEAN,

	MT_LOW_VECTORS,

	MT_HIGH_VECTORS,

	MT_MEMORY_RWX,

	MT_ROM,

	MT_MEMORY_RWX_NONCACHED,

	MT_MEMORY_RW_DTCM,

	MT_MEMORY_RWX_ITCM,

	MT_MEMORY_RW_SO,

	MT_MEMORY_DMA_READY,

};



#ifdef CONFIG_MMU

extern void iotable_init(struct map_desc *, int);

arch/arm/kernel/tcm.c

+2 −2
Original line number Diff line number Diff line
@@ -52,7 +52,7 @@ static struct map_desc dtcm_iomap[] __initdata = { 
		.virtual	= DTCM_OFFSET,

		.pfn		= __phys_to_pfn(DTCM_OFFSET),

		.length		= 0,

		.type		= MT_MEMORY_DTCM

		.type		= MT_MEMORY_RW_DTCM

	}

};
@@ -61,7 +61,7 @@ static struct map_desc itcm_iomap[] __initdata = { 
		.virtual	= ITCM_OFFSET,

		.pfn		= __phys_to_pfn(ITCM_OFFSET),

		.length		= 0,

		.type		= MT_MEMORY_ITCM

		.type		= MT_MEMORY_RWX_ITCM,

	}

};

arch/arm/mach-at91/setup.c

+1 −1
Original line number Diff line number Diff line
@@ -81,7 +81,7 @@ void __init at91_init_sram(int bank, unsigned long base, unsigned int length) 


	desc->pfn = __phys_to_pfn(base);

	desc->length = length;

	desc->type = MT_MEMORY_NONCACHED;

	desc->type = MT_MEMORY_RWX_NONCACHED;



	pr_info("AT91: sram at 0x%lx of 0x%x mapped at 0x%lx\n",

		base, length, desc->virtual);

arch/arm/mach-omap2/io.c

+2 −2
Original line number Diff line number Diff line
@@ -244,7 +244,7 @@ static struct map_desc omap44xx_io_desc[] __initdata = { 
		.virtual	= OMAP4_SRAM_VA,

		.pfn		= __phys_to_pfn(OMAP4_SRAM_PA),

		.length		= PAGE_SIZE,

		.type		= MT_MEMORY_SO,

		.type		= MT_MEMORY_RW_SO,

	},

#endif
@@ -282,7 +282,7 @@ static struct map_desc omap54xx_io_desc[] __initdata = { 
		.virtual	= OMAP4_SRAM_VA,

		.pfn		= __phys_to_pfn(OMAP4_SRAM_PA),

		.length		= PAGE_SIZE,

		.type		= MT_MEMORY_SO,

		.type		= MT_MEMORY_RW_SO,

	},

#endif

};

arch/arm/mach-omap2/omap4-common.c

+1 −1
Original line number Diff line number Diff line
@@ -88,7 +88,7 @@ void __init omap_barriers_init(void) 
	dram_io_desc[0].virtual = OMAP4_DRAM_BARRIER_VA;

	dram_io_desc[0].pfn = __phys_to_pfn(paddr);

	dram_io_desc[0].length = size;

	dram_io_desc[0].type = MT_MEMORY_SO;

	dram_io_desc[0].type = MT_MEMORY_RW_SO;

	iotable_init(dram_io_desc, ARRAY_SIZE(dram_io_desc));

	dram_sync = (void __iomem *) dram_io_desc[0].virtual;

	sram_sync = (void __iomem *) OMAP4_SRAM_VA;