leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity
d6b5d01b3f
linux/arch/arm/plat-omap/sram.c
Santosh Shilimkar b9b35ade88 omap4: Remove 'FIXME: omap44xx_sram_init not implemented' 
The omap44xx_sram_init() implements functionality to push some
code on SRAM whenever the code can't be executed from external
memory. The low power and DVFS code can be executed from
external DDR itself thanks to OMAP4  memory controller hardware
support. So on OMAP4, sram_push kind of functionality isn't needed.

Hence remove the FIXME warning added for implementing sram push
feature on OMAP4.

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2011-02-17 09:55:03 -08:00

424 lines
12 KiB
C
Raw Blame History

/*
* linux/arch/arm/plat-omap/sram.c
*
* OMAP SRAM detection and management
*
* Copyright (C) 2005 Nokia Corporation
* Written by Tony Lindgren <tony@atomide.com>
*
* Copyright (C) 2009 Texas Instruments
* Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
*
* 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.
*/
#undef DEBUG
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/omapfb.h>
#include <asm/tlb.h>
#include <asm/cacheflush.h>
#include <asm/mach/map.h>
#include <plat/sram.h>
#include <plat/board.h>
#include <plat/cpu.h>
#include <plat/vram.h>
#include "sram.h"
#include "fb.h"
/* XXX These "sideways" includes are a sign that something is wrong */
#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
# include "../mach-omap2/prm2xxx_3xxx.h"
# include "../mach-omap2/sdrc.h"
#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
#else
#define SRAM_BOOTLOADER_SZ 0x80
#endif
#define OMAP24XX_VA_REQINFOPERM0 OMAP2_L3_IO_ADDRESS(0x68005048)
#define OMAP24XX_VA_READPERM0 OMAP2_L3_IO_ADDRESS(0x68005050)
#define OMAP24XX_VA_WRITEPERM0 OMAP2_L3_IO_ADDRESS(0x68005058)
#define OMAP34XX_VA_REQINFOPERM0 OMAP2_L3_IO_ADDRESS(0x68012848)
#define OMAP34XX_VA_READPERM0 OMAP2_L3_IO_ADDRESS(0x68012850)
#define OMAP34XX_VA_WRITEPERM0 OMAP2_L3_IO_ADDRESS(0x68012858)
#define OMAP34XX_VA_ADDR_MATCH2 OMAP2_L3_IO_ADDRESS(0x68012880)
#define OMAP34XX_VA_SMS_RG_ATT0 OMAP2_L3_IO_ADDRESS(0x6C000048)
#define GP_DEVICE 0x300
#define ROUND_DOWN(value,boundary) ((value) & (~((boundary)-1)))
static unsigned long omap_sram_start;
static unsigned long omap_sram_base;
static unsigned long omap_sram_size;
static unsigned long omap_sram_ceil;
/*
* Depending on the target RAMFS firewall setup, the public usable amount of
* SRAM varies. The default accessible size for all device types is 2k. A GP
* device allows ARM11 but not other initiators for full size. This
* functionality seems ok until some nice security API happens.
*/
static int is_sram_locked(void)
{
if (OMAP2_DEVICE_TYPE_GP == omap_type()) {
/* RAMFW: R/W access to all initiators for all qualifier sets */
if (cpu_is_omap242x()) {
__raw_writel(0xFF, OMAP24XX_VA_REQINFOPERM0); /* all q-vects */
__raw_writel(0xCFDE, OMAP24XX_VA_READPERM0); /* all i-read */
__raw_writel(0xCFDE, OMAP24XX_VA_WRITEPERM0); /* all i-write */
}
if (cpu_is_omap34xx()) {
__raw_writel(0xFFFF, OMAP34XX_VA_REQINFOPERM0); /* all q-vects */
__raw_writel(0xFFFF, OMAP34XX_VA_READPERM0); /* all i-read */
__raw_writel(0xFFFF, OMAP34XX_VA_WRITEPERM0); /* all i-write */
__raw_writel(0x0, OMAP34XX_VA_ADDR_MATCH2);
__raw_writel(0xFFFFFFFF, OMAP34XX_VA_SMS_RG_ATT0);
}
return 0;
} else
return 1; /* assume locked with no PPA or security driver */
}
/*
* The amount of SRAM depends on the core type.
* Note that we cannot try to test for SRAM here because writes
* to secure SRAM will hang the system. Also the SRAM is not
* yet mapped at this point.
*/
static void __init omap_detect_sram(void)
{
unsigned long reserved;
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)) {
omap_sram_size = 0x7000; /* 28K */
} else {
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 */
else if (cpu_is_omap243x())
omap_sram_size = 0x10000; /* 64K */
}
}
} else {
omap_sram_base = OMAP1_SRAM_VA;
omap_sram_start = OMAP1_SRAM_PA;
if (cpu_is_omap7xx())
omap_sram_size = 0x32000; /* 200K */
else if (cpu_is_omap15xx())
omap_sram_size = 0x30000; /* 192K */
else if (cpu_is_omap1610() || cpu_is_omap1621() ||
cpu_is_omap1710())
omap_sram_size = 0x4000; /* 16K */
else if (cpu_is_omap1611())
omap_sram_size = SZ_256K;
else {
printk(KERN_ERR "Could not detect SRAM size\n");
omap_sram_size = 0x4000;
}
}
reserved = omapfb_reserve_sram(omap_sram_start, omap_sram_base,
omap_sram_size,
omap_sram_start + SRAM_BOOTLOADER_SZ,
omap_sram_size - SRAM_BOOTLOADER_SZ);
omap_sram_size -= reserved;
reserved = omap_vram_reserve_sram(omap_sram_start, omap_sram_base,
omap_sram_size,
omap_sram_start + SRAM_BOOTLOADER_SZ,
omap_sram_size - SRAM_BOOTLOADER_SZ);
omap_sram_size -= reserved;
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;
if (omap_sram_size == 0)
return;
if (cpu_is_omap34xx()) {
/*
* SRAM must be marked as non-cached on OMAP3 since the
* CORE DPLL M2 divider change code (in SRAM) runs with the
* SDRAM controller disabled, and if it is marked cached,
* 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;
}
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));
printk(KERN_INFO "SRAM: Mapped pa 0x%08lx to va 0x%08lx size: 0x%lx\n",
__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();
/*
* Looks like we need to preserve some bootloader code at the
* beginning of SRAM for jumping to flash for reboot to work...
*/
memset((void *)omap_sram_base + SRAM_BOOTLOADER_SZ, 0,
omap_sram_size - SRAM_BOOTLOADER_SZ);
}
void * omap_sram_push(void * start, unsigned long size)
{
if (size > (omap_sram_ceil - (omap_sram_base + SRAM_BOOTLOADER_SZ))) {
printk(KERN_ERR "Not enough space in SRAM\n");
return NULL;
}
omap_sram_ceil -= size;
omap_sram_ceil = ROUND_DOWN(omap_sram_ceil, sizeof(void *));
memcpy((void *)omap_sram_ceil, start, size);
flush_icache_range((unsigned long)omap_sram_ceil,
(unsigned long)(omap_sram_ceil + size));
return (void *)omap_sram_ceil;
}
#ifdef CONFIG_ARCH_OMAP1
static void (*_omap_sram_reprogram_clock)(u32 dpllctl, u32 ckctl);
void omap_sram_reprogram_clock(u32 dpllctl, u32 ckctl)
{
BUG_ON(!_omap_sram_reprogram_clock);
_omap_sram_reprogram_clock(dpllctl, ckctl);
}
static int __init omap1_sram_init(void)
{
_omap_sram_reprogram_clock =
omap_sram_push(omap1_sram_reprogram_clock,
omap1_sram_reprogram_clock_sz);
return 0;
}
#else
#define omap1_sram_init() do {} while (0)
#endif
#if defined(CONFIG_ARCH_OMAP2)
static void (*_omap2_sram_ddr_init)(u32 *slow_dll_ctrl, u32 fast_dll_ctrl,
u32 base_cs, u32 force_unlock);
void omap2_sram_ddr_init(u32 *slow_dll_ctrl, u32 fast_dll_ctrl,
u32 base_cs, u32 force_unlock)
{
BUG_ON(!_omap2_sram_ddr_init);
_omap2_sram_ddr_init(slow_dll_ctrl, fast_dll_ctrl,
base_cs, force_unlock);
}
static void (*_omap2_sram_reprogram_sdrc)(u32 perf_level, u32 dll_val,
u32 mem_type);
void omap2_sram_reprogram_sdrc(u32 perf_level, u32 dll_val, u32 mem_type)
{
BUG_ON(!_omap2_sram_reprogram_sdrc);
_omap2_sram_reprogram_sdrc(perf_level, dll_val, mem_type);
}
static u32 (*_omap2_set_prcm)(u32 dpll_ctrl_val, u32 sdrc_rfr_val, int bypass);
u32 omap2_set_prcm(u32 dpll_ctrl_val, u32 sdrc_rfr_val, int bypass)
{
BUG_ON(!_omap2_set_prcm);
return _omap2_set_prcm(dpll_ctrl_val, sdrc_rfr_val, bypass);
}
#endif
#ifdef CONFIG_SOC_OMAP2420
static int __init omap242x_sram_init(void)
{
_omap2_sram_ddr_init = omap_sram_push(omap242x_sram_ddr_init,
omap242x_sram_ddr_init_sz);
_omap2_sram_reprogram_sdrc = omap_sram_push(omap242x_sram_reprogram_sdrc,
omap242x_sram_reprogram_sdrc_sz);
_omap2_set_prcm = omap_sram_push(omap242x_sram_set_prcm,
omap242x_sram_set_prcm_sz);
return 0;
}
#else
static inline int omap242x_sram_init(void)
{
return 0;
}
#endif
#ifdef CONFIG_SOC_OMAP2430
static int __init omap243x_sram_init(void)
{
_omap2_sram_ddr_init = omap_sram_push(omap243x_sram_ddr_init,
omap243x_sram_ddr_init_sz);
_omap2_sram_reprogram_sdrc = omap_sram_push(omap243x_sram_reprogram_sdrc,
omap243x_sram_reprogram_sdrc_sz);
_omap2_set_prcm = omap_sram_push(omap243x_sram_set_prcm,
omap243x_sram_set_prcm_sz);
return 0;
}
#else
static inline int omap243x_sram_init(void)
{
return 0;
}
#endif
#ifdef CONFIG_ARCH_OMAP3
static u32 (*_omap3_sram_configure_core_dpll)(
u32 m2, u32 unlock_dll, u32 f, u32 inc,
u32 sdrc_rfr_ctrl_0, u32 sdrc_actim_ctrl_a_0,
u32 sdrc_actim_ctrl_b_0, u32 sdrc_mr_0,
u32 sdrc_rfr_ctrl_1, u32 sdrc_actim_ctrl_a_1,
u32 sdrc_actim_ctrl_b_1, u32 sdrc_mr_1);
u32 omap3_configure_core_dpll(u32 m2, u32 unlock_dll, u32 f, u32 inc,
u32 sdrc_rfr_ctrl_0, u32 sdrc_actim_ctrl_a_0,
u32 sdrc_actim_ctrl_b_0, u32 sdrc_mr_0,
u32 sdrc_rfr_ctrl_1, u32 sdrc_actim_ctrl_a_1,
u32 sdrc_actim_ctrl_b_1, u32 sdrc_mr_1)
{
BUG_ON(!_omap3_sram_configure_core_dpll);
return _omap3_sram_configure_core_dpll(
m2, unlock_dll, f, inc,
sdrc_rfr_ctrl_0, sdrc_actim_ctrl_a_0,
sdrc_actim_ctrl_b_0, sdrc_mr_0,
sdrc_rfr_ctrl_1, sdrc_actim_ctrl_a_1,
sdrc_actim_ctrl_b_1, sdrc_mr_1);
}
#ifdef CONFIG_PM
void omap3_sram_restore_context(void)
{
omap_sram_ceil = omap_sram_base + omap_sram_size;
_omap3_sram_configure_core_dpll =
omap_sram_push(omap3_sram_configure_core_dpll,
omap3_sram_configure_core_dpll_sz);
omap_push_sram_idle();
}
#endif /* CONFIG_PM */
static int __init omap34xx_sram_init(void)
{
_omap3_sram_configure_core_dpll =
omap_sram_push(omap3_sram_configure_core_dpll,
omap3_sram_configure_core_dpll_sz);
omap_push_sram_idle();
return 0;
}
#else
static inline int omap34xx_sram_init(void)
{
return 0;
}
#endif
int __init omap_sram_init(void)
{
omap_detect_sram();
omap_map_sram();
if (!(cpu_class_is_omap2()))
omap1_sram_init();
else if (cpu_is_omap242x())
omap242x_sram_init();
else if (cpu_is_omap2430())
omap243x_sram_init();
else if (cpu_is_omap34xx())
omap34xx_sram_init();
return 0;
}
Reference in New Issue View Git Blame Copy Permalink