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ARM: OMAP: Map SRAM later on with ioremap_exec()

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This allows us to remove omap hacks for map_io.

Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Tony Lindgren 2011-10-04 13:52:57 -07:00
parent fee926bb0d
commit a66cb3454f
6 changed files with 28 additions and 76 deletions
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3
arch/arm/mach-omap1/devices.c
View File

@ -21,6 +21,7 @@
#include <mach/hardware.h>
#include <asm/mach/map.h>
#include <plat/common.h>
#include <plat/tc.h>
#include <plat/board.h>
#include <plat/mux.h>
@ -291,6 +292,8 @@ static int __init omap1_init_devices(void)
if (!cpu_class_is_omap1())
return -ENODEV;
omap_sram_init();
/* please keep these calls, and their implementations above,
* in alphabetical order so they're easier to sort through.
*/

2
arch/arm/mach-omap1/io.c
View File

@ -21,7 +21,6 @@
#include "clock.h"
extern void omap_check_revision(void);
extern void omap_sram_init(void);
/*
* The machine specific code may provide the extra mapping besides the
@ -133,7 +132,6 @@ void omap1_init_early(void)
*/
omap1_clk_init();
omap1_mux_init();
omap_sram_init();
}
/*

21
arch/arm/mach-omap2/io.c
View File

@ -35,8 +35,8 @@
#include "clock2xxx.h"
#include "clock3xxx.h"
#include "clock44xx.h"
#include "io.h"
#include <plat/common.h>
#include <plat/omap-pm.h>
#include "voltage.h"
#include "powerdomain.h"
@ -240,22 +240,11 @@ static struct map_desc omap44xx_io_desc[] __initdata = {
};
#endif
static void __init _omap2_map_common_io(void)
{
/* Normally devicemaps_init() would flush caches and tlb after
* mdesc->map_io(), but we must also do it here because of the CPU
* revision check below.
*/
local_flush_tlb_all();
flush_cache_all();
}
#ifdef CONFIG_SOC_OMAP2420
void __init omap242x_map_common_io(void)
{
iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
iotable_init(omap242x_io_desc, ARRAY_SIZE(omap242x_io_desc));
_omap2_map_common_io();
}
#endif
@ -264,7 +253,6 @@ void __init omap243x_map_common_io(void)
{
iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
iotable_init(omap243x_io_desc, ARRAY_SIZE(omap243x_io_desc));
_omap2_map_common_io();
}
#endif
@ -272,7 +260,6 @@ void __init omap243x_map_common_io(void)
void __init omap34xx_map_common_io(void)
{
iotable_init(omap34xx_io_desc, ARRAY_SIZE(omap34xx_io_desc));
_omap2_map_common_io();
}
#endif
@ -280,7 +267,6 @@ void __init omap34xx_map_common_io(void)
void __init omapti816x_map_common_io(void)
{
iotable_init(omapti816x_io_desc, ARRAY_SIZE(omapti816x_io_desc));
_omap2_map_common_io();
}
#endif
@ -288,7 +274,6 @@ void __init omapti816x_map_common_io(void)
void __init omap44xx_map_common_io(void)
{
iotable_init(omap44xx_io_desc, ARRAY_SIZE(omap44xx_io_desc));
_omap2_map_common_io();
}
#endif
@ -337,7 +322,6 @@ void __iomem *omap_irq_base;
static void __init omap_common_init_early(void)
{
omap2_check_revision();
omap_sram_init();
}
static void __init omap_hwmod_init_postsetup(void)
@ -449,11 +433,12 @@ void __init omap4430_init_early(void)
void __init omap_sdrc_init(struct omap_sdrc_params *sdrc_cs0,
struct omap_sdrc_params *sdrc_cs1)
{
omap_sram_init();
if (cpu_is_omap24xx() || omap3_has_sdrc()) {
omap2_sdrc_init(sdrc_cs0, sdrc_cs1);
_omap2_init_reprogram_sdrc();
}
}
/*

7
arch/arm/mach-omap2/io.h
View File

@ -1,7 +0,0 @@
#ifndef __MACH_OMAP2_IO_H__
#define __MACH_OMAP2_IO_H__
extern int __init omap_sram_init(void);
#endif /* __MACH_OMAP2_IO_H__ */

2
arch/arm/plat-omap/include/plat/common.h
View File

@ -55,6 +55,8 @@ void am35xx_init_early(void);
void ti816x_init_early(void);
void omap4430_init_early(void);
void omap_sram_init(void);
/*
* IO bases for various OMAP processors
* Except the tap base, rest all the io bases

69
arch/arm/plat-omap/sram.c
View File

@ -38,16 +38,9 @@
#endif
#define OMAP1_SRAM_PA 0x20000000
#define OMAP1_SRAM_VA VMALLOC_END
#define OMAP2_SRAM_PUB_PA (OMAP2_SRAM_PA + 0xf800)
#define OMAP2_SRAM_VA 0xfe400000
#define OMAP2_SRAM_PUB_VA (OMAP2_SRAM_VA + 0x800)
#define OMAP3_SRAM_VA 0xfe400000
#define OMAP3_SRAM_PUB_PA (OMAP3_SRAM_PA + 0x8000)
#define OMAP3_SRAM_PUB_VA (OMAP3_SRAM_VA + 0x8000)
#define OMAP4_SRAM_VA 0xfe400000
#define OMAP4_SRAM_PUB_PA (OMAP4_SRAM_PA + 0x4000)
#define OMAP4_SRAM_PUB_VA (OMAP4_SRAM_VA + 0x4000)
#if defined(CONFIG_ARCH_OMAP2PLUS)
#define SRAM_BOOTLOADER_SZ 0x00
@ -70,9 +63,9 @@
#define ROUND_DOWN(value,boundary) ((value) & (~((boundary)-1)))
static unsigned long omap_sram_start;
static unsigned long omap_sram_base;
static void __iomem *omap_sram_base;
static unsigned long omap_sram_size;
static unsigned long omap_sram_ceil;
static void __iomem *omap_sram_ceil;
/*
* Depending on the target RAMFS firewall setup, the public usable amount of
@ -112,7 +105,6 @@ static void __init omap_detect_sram(void)
if (cpu_class_is_omap2()) {
if (is_sram_locked()) {
if (cpu_is_omap34xx()) {
omap_sram_base = OMAP3_SRAM_PUB_VA;
omap_sram_start = OMAP3_SRAM_PUB_PA;
if ((omap_type() == OMAP2_DEVICE_TYPE_EMU) ||
(omap_type() == OMAP2_DEVICE_TYPE_SEC)) {
@ -121,25 +113,20 @@ static void __init omap_detect_sram(void)
omap_sram_size = 0x8000; /* 32K */
}
} else if (cpu_is_omap44xx()) {
omap_sram_base = OMAP4_SRAM_PUB_VA;
omap_sram_start = OMAP4_SRAM_PUB_PA;
omap_sram_size = 0xa000; /* 40K */
} else {
omap_sram_base = OMAP2_SRAM_PUB_VA;
omap_sram_start = OMAP2_SRAM_PUB_PA;
omap_sram_size = 0x800; /* 2K */
}
} else {
if (cpu_is_omap34xx()) {
omap_sram_base = OMAP3_SRAM_VA;
omap_sram_start = OMAP3_SRAM_PA;
omap_sram_size = 0x10000; /* 64K */
} else if (cpu_is_omap44xx()) {
omap_sram_base = OMAP4_SRAM_VA;
omap_sram_start = OMAP4_SRAM_PA;
omap_sram_size = 0xe000; /* 56K */
} else {
omap_sram_base = OMAP2_SRAM_VA;
omap_sram_start = OMAP2_SRAM_PA;
if (cpu_is_omap242x())
omap_sram_size = 0xa0000; /* 640K */
@ -148,7 +135,6 @@ static void __init omap_detect_sram(void)
}
}
} else {
omap_sram_base = OMAP1_SRAM_VA;
omap_sram_start = OMAP1_SRAM_PA;
if (cpu_is_omap7xx())
@ -165,24 +151,14 @@ static void __init omap_detect_sram(void)
omap_sram_size = 0x4000;
}
}
omap_sram_ceil = omap_sram_base + omap_sram_size;
}
static struct map_desc omap_sram_io_desc[] __initdata = {
{ /* .length gets filled in at runtime */
.virtual = OMAP1_SRAM_VA,
.pfn = __phys_to_pfn(OMAP1_SRAM_PA),
.type = MT_MEMORY
}
};
/*
* Note that we cannot use ioremap for SRAM, as clock init needs SRAM early.
*/
static void __init omap_map_sram(void)
{
unsigned long base;
int cached = 1;
if (omap_sram_size == 0)
return;
@ -195,28 +171,18 @@ static void __init omap_map_sram(void)
* the ARM may attempt to write cache lines back to SDRAM
* which will cause the system to hang.
*/
omap_sram_io_desc[0].type = MT_MEMORY_NONCACHED;
cached = 0;
}
omap_sram_io_desc[0].virtual = omap_sram_base;
base = omap_sram_start;
base = ROUND_DOWN(base, PAGE_SIZE);
omap_sram_io_desc[0].pfn = __phys_to_pfn(base);
omap_sram_io_desc[0].length = ROUND_DOWN(omap_sram_size, PAGE_SIZE);
iotable_init(omap_sram_io_desc, ARRAY_SIZE(omap_sram_io_desc));
omap_sram_start = ROUND_DOWN(omap_sram_start, PAGE_SIZE);
omap_sram_base = __arm_ioremap_exec(omap_sram_start, omap_sram_size,
cached);
if (!omap_sram_base) {
pr_err("SRAM: Could not map\n");
return;
}
pr_info("SRAM: Mapped pa 0x%08llx to va 0x%08lx size: 0x%lx\n",
(long long) __pfn_to_phys(omap_sram_io_desc[0].pfn),
omap_sram_io_desc[0].virtual,
omap_sram_io_desc[0].length);
/*
* Normally devicemaps_init() would flush caches and tlb after
* mdesc->map_io(), but since we're called from map_io(), we
* must do it here.
*/
local_flush_tlb_all();
flush_cache_all();
omap_sram_ceil = omap_sram_base + omap_sram_size;
/*
* Looks like we need to preserve some bootloader code at the
@ -235,13 +201,18 @@ static void __init omap_map_sram(void)
*/
void *omap_sram_push_address(unsigned long size)
{
if (size > (omap_sram_ceil - (omap_sram_base + SRAM_BOOTLOADER_SZ))) {
unsigned long available, new_ceil = (unsigned long)omap_sram_ceil;
available = omap_sram_ceil - (omap_sram_base + SRAM_BOOTLOADER_SZ);
if (size > available) {
pr_err("Not enough space in SRAM\n");
return NULL;
}
omap_sram_ceil -= size;
omap_sram_ceil = ROUND_DOWN(omap_sram_ceil, FNCPY_ALIGN);
new_ceil -= size;
new_ceil = ROUND_DOWN(new_ceil, FNCPY_ALIGN);
omap_sram_ceil = IOMEM(new_ceil);
return (void *)omap_sram_ceil;
}