"ext Rajendra Nayak" <rnayak@xxxxxx> writes:
> This patch populates the scratchpad
>
> Signed-off-by: Rajendra Nayak <rnayak@xxxxxx>
>
> ---
> arch/arm/mach-omap2/pm.h | 7 +
> arch/arm/mach-omap2/pm34xx.c | 170 +++++++++++++++++++++++++++++++++++++++-
> arch/arm/mach-omap2/sleep34xx.S | 8 -
> include/asm-arm/arch-omap/pm.h | 4
> 4 files changed, 182 insertions(+), 7 deletions(-)
>
> Index: linux-omap-2.6/arch/arm/mach-omap2/pm.h
> ===================================================================
> --- linux-omap-2.6.orig/arch/arm/mach-omap2/pm.h 2008-07-01 17:21:12.738682737 +0530
> +++ linux-omap-2.6/arch/arm/mach-omap2/pm.h 2008-07-01 17:21:12.783681306 +0530
> @@ -20,6 +20,13 @@ extern unsigned short enable_dyn_sleep;
> extern unsigned short clocks_off_while_idle;
> extern atomic_t sleep_block;
>
> +#define SCRATCHPAD_ROM 0x48002860
> +#define SCRATCHPAD 0x48002910
> +#define SCRATHPAD_ROM_OFFSET 0x19C
> +#define TABLE_ADDRESS_OFFSET 0x31
> +#define TABLE_VALUE_OFFSET 0x30
> +#define CONTROL_REG_VALUE_OFFSET 0x32
> +
> #ifdef CONFIG_PM_DEBUG
> extern void omap2_pm_dump(int mode, int resume, unsigned int us);
> extern int omap2_pm_debug;
> Index: linux-omap-2.6/arch/arm/mach-omap2/pm34xx.c
> ===================================================================
> --- linux-omap-2.6.orig/arch/arm/mach-omap2/pm34xx.c 2008-07-01 17:21:12.761682006 +0530
> +++ linux-omap-2.6/arch/arm/mach-omap2/pm34xx.c 2008-07-01 17:22:24.120412909 +0530
> @@ -30,6 +30,9 @@
> #include <asm/arch/clockdomain.h>
> #include <asm/arch/powerdomain.h>
> #include <asm/arch/common.h>
> +#include <asm/arch/sdrc.h>
> +#include <asm/tlbflush.h>
> +#include "sdrc.h"
>
> #include "cm.h"
> #include "cm-regbits-34xx.h"
> @@ -38,6 +41,12 @@
> #include "prm.h"
> #include "pm.h"
> #include "smartreflex.h"
> +#include "clock34xx.h"
> +
> +#define OMAP3430_PRM_RSTST \
> + OMAP34XX_PRM_REGADDR(OMAP3430_GR_MOD, 0x0058)
> +
> +u32 context_mem[128];
>
> struct power_state {
> struct powerdomain *pwrdm;
> @@ -46,6 +55,9 @@ struct power_state {
> struct list_head node;
> };
>
> +u32 *scratchpad_restore_addr;
> +u32 restore_pointer_address;
> +
> static LIST_HEAD(pwrst_list);
>
> void (*_omap_sram_idle)(u32 *addr, int save_state, int disable_clocks);
> @@ -176,6 +188,35 @@ static irqreturn_t prcm_interrupt_handle
> return IRQ_HANDLED;
> }
>
> +static void restore_control_register(u32 val)
> +{
> + __asm__ __volatile__ ("mcr p15, 0, %0, c1, c0, 0" : : "r" (val));
> +}
> +
> +/* Function to restore the table entry that was modified for enabling MMU*/
> +static void restore_table_entry(void)
> +{
> + u32 *scratchpad_address;
> + u32 previous_value, control_reg_value;
> + u32 *address;
> + /* Get virtual address of SCRATCHPAD */
> + scratchpad_address = (u32 *) io_p2v(SCRATCHPAD);
> + /* Get address of entry that was modified */
> + address = (u32 *) *(scratchpad_address + TABLE_ADDRESS_OFFSET);
> + /* Get the previous value which needs to be restored */
> + previous_value = *(scratchpad_address + TABLE_VALUE_OFFSET);
> + /* Convert address to virtual address */
> + address = __va(address);
> + /* Restore table entry */
> + *address = previous_value;
> + /* Flush TLB */
> + flush_tlb_all();
> + control_reg_value = *(scratchpad_address + CONTROL_REG_VALUE_OFFSET);
> + /* Restore control register*/
> + /* This will enable caches and prediction */
> + restore_control_register(control_reg_value);
> +}
> +
> void omap_sram_idle(void)
> {
> /* Variable to tell what needs to be saved and restored
> @@ -196,13 +237,19 @@ void omap_sram_idle(void)
> /* No need to save context */
> save_state = 0;
> break;
> + case PWRDM_POWER_OFF:
> + save_state = 3;
> + break;
> default:
> /* Invalid state */
> printk(KERN_ERR "Invalid mpu state in sram_idle\n");
> return;
> }
>
> - _omap_sram_idle(NULL, save_state, clocks_off_while_idle);
> + _omap_sram_idle(context_mem, save_state, clocks_off_while_idle);
> + /* Restore table entry modified during MMU restoration */
> + if (pwrdm_read_prev_pwrst(mpu_pwrdm) == 0x0)
> + restore_table_entry();
> }
>
> static int omap3_fclks_active(void)
> @@ -593,7 +640,10 @@ static int __init pwrdms_setup(struct po
> if (!pwrst)
> return -ENOMEM;
> pwrst->pwrdm = pwrdm;
> - pwrst->next_state = PWRDM_POWER_RET;
> + if (!strcmp(pwrst->pwrdm->name, "core_pwrdm"))
> + pwrst->next_state = PWRDM_POWER_RET;
> + else
> + pwrst->next_state = PWRDM_POWER_OFF;
I think writing these states here should be behind #ifdef
CONFIG_CPU_IDLE at least what comest to mpu, neon and core. Then as we
have srf in l-o tree, rest of the pwrdm states should be written in
that code. This is basically for traditional pm_idle loop. Anyway
until srf is in tree you could write other than mpu, neon and core
states here.
> list_add(&pwrst->node, &pwrst_list);
>
> if (pwrdm_has_hdwr_sar(pwrdm))
> @@ -659,5 +709,121 @@ err2:
> list_del(&pwrst->node);
> kfree(pwrst);
> }
> +
> return ret;
> }
> +
> +/* Clears the scratchpad contents in case of cold boot- called during bootup*/
> +void clear_scratchpad_contents(void)
> +{
> + u32 max_offset = SCRATHPAD_ROM_OFFSET;
> + u32 offset = 0;
> + u32 v;
> + u32 v_addr = io_p2v(SCRATCHPAD_ROM);
> + if (__raw_readl(OMAP3430_PRM_RSTST) & 0x1) {
> + for ( ; offset <= max_offset; offset += 0x4)
> + __raw_writel(0x0, (v_addr + offset));
> + v = __raw_readl(OMAP3430_PRM_RSTST);
> + v |= 0x1;
> + __raw_writel(v, OMAP3430_PRM_RSTST);
> + }
> +}
> +
> +/* Populate the scratchpad structure with restore structure */
> +void save_scratchpad_contents(void)
> +{
> + u32 *scratchpad_address;
> + u32 *restore_address;
> + u32 *sdram_context_address;
> +
> + /* Get virtual address of SCRATCHPAD */
> + scratchpad_address = (u32 *) io_p2v(SCRATCHPAD);
> + /* Get Restore pointer to jump to while waking up from OFF */
> + restore_address = get_restore_pointer();
> + /* Convert it to physical address */
> + restore_address = (u32 *) io_v2p(restore_address);
> + /* Get address where registers are saved in SDRAM */
> + sdram_context_address = (u32 *) io_v2p(context_mem);
> + /* Booting configuration pointer*/
> + *(scratchpad_address++) = 0x0;
> + /* Public restore pointer */
> + /* On ES 2.0, if scrathpad is populated with valid
> + * pointer, warm reset does not work
> + * So populate scrathpad restore address only in
> + * cpuidle and suspend calls
> + */
> + scratchpad_restore_addr = scratchpad_address;
> + restore_pointer_address = (u32) restore_address;
> + *(scratchpad_address++) = 0x0;
> + /* Secure ram restore pointer */
> + *(scratchpad_address++) = 0x0;
> + /* SDRC Module semaphore */
> + *(scratchpad_address++) = 0x0;
> + /* PRCM Block Offset */
> + *(scratchpad_address++) = 0x2C;
> + /* SDRC Block Offset */
> + *(scratchpad_address++) = 0x64;
> + /* Empty */
> + /* Offset 0x8*/
> + *(scratchpad_address++) = 0x0;
> + *(scratchpad_address++) = 0x0;
> + /* Offset 0xC*/
> + *(scratchpad_address++) = 0x0;
> + /* Offset 0x10*/
> + *(scratchpad_address++) = 0x0;
> + /* Offset 0x14*/
> + *(scratchpad_address++) = 0x0;
> + /* Offset 0x18*/
> + /* PRCM Block */
> + *(scratchpad_address++) = __raw_readl(OMAP3430_PRM_CLKSRC_CTRL);
> + *(scratchpad_address++) = __raw_readl(OMAP3430_PRM_CLKSEL);
> + *(scratchpad_address++) = cm_read_mod_reg(CORE_MOD, CM_CLKSEL);
> + *(scratchpad_address++) = cm_read_mod_reg(WKUP_MOD, CM_CLKSEL);
> + *(scratchpad_address++) = cm_read_mod_reg(PLL_MOD,
> + OMAP3430_CM_CLKEN_PLL);
> + *(scratchpad_address++) = cm_read_mod_reg(PLL_MOD,
> + OMAP3430_CM_AUTOIDLE_PLL);
> + *(scratchpad_address++) = cm_read_mod_reg(PLL_MOD,
> + OMAP3430_CM_CLKSEL1_PLL);
> + *(scratchpad_address++) = cm_read_mod_reg(PLL_MOD,
> + OMAP3430_CM_CLKSEL2_PLL);
> + *(scratchpad_address++) = cm_read_mod_reg(PLL_MOD,
> + OMAP3430_CM_CLKSEL3);
> + *(scratchpad_address++) = cm_read_mod_reg(MPU_MOD,
> + OMAP3430_CM_CLKEN_PLL);
> + *(scratchpad_address++) = cm_read_mod_reg(MPU_MOD,
> + OMAP3430_CM_AUTOIDLE_PLL);
> + *(scratchpad_address++) = cm_read_mod_reg(MPU_MOD,
> + OMAP3430_CM_CLKSEL1_PLL);
> + *(scratchpad_address++) = cm_read_mod_reg(MPU_MOD,
> + OMAP3430_CM_CLKSEL2_PLL);
> + *(scratchpad_address++) = 0x0;
> + /* SDRC Block */
> + *(scratchpad_address++) = (((sdrc_read_reg(SDRC_CS_CFG) & 0xFFFF) << 16)
> + | (sdrc_read_reg(SDRC_SYSCONFIG) & 0xFFFF));
> + *(scratchpad_address++) = (((sdrc_read_reg(SDRC_ERR_TYPE)
> + & 0xFFFF) << 16)
> + | (sdrc_read_reg(SDRC_SHARING) & 0xFFFF));
> + *(scratchpad_address++) = sdrc_read_reg(SDRC_DLLA_CTRL);
> + *(scratchpad_address++) = 0x0;
> + *(scratchpad_address++) = sdrc_read_reg(SDRC_POWER);
> + *(scratchpad_address++) = 0x0;
> + *(scratchpad_address++) = sdrc_read_reg(SDRC_MCFG_0);
> + *(scratchpad_address++) = sdrc_read_reg(SDRC_MR_0) & 0xFFFF;
> + *(scratchpad_address++) = 0x0;
> + *(scratchpad_address++) = sdrc_read_reg(SDRC_ACTIM_CTRL_A_0);
> + *(scratchpad_address++) = sdrc_read_reg(SDRC_ACTIM_CTRL_B_0);
> + *(scratchpad_address++) = sdrc_read_reg(SDRC_RFR_CTRL_0);
> + *(scratchpad_address++) = 0x0;
> + *(scratchpad_address++) = sdrc_read_reg(SDRC_MCFG_1);
> + *(scratchpad_address++) = sdrc_read_reg(SDRC_MR_1) & 0xFFFF;
> + *(scratchpad_address++) = 0x0;
> + *(scratchpad_address++) = sdrc_read_reg(SDRC_ACTIM_CTRL_A_1);
> + *(scratchpad_address++) = sdrc_read_reg(SDRC_ACTIM_CTRL_B_1);
> + *(scratchpad_address++) = sdrc_read_reg(SDRC_RFR_CTRL_1);
> + *(scratchpad_address++) = 0x0;
> + *(scratchpad_address++) = 0x0;
> + *(scratchpad_address++) = 0x0;
> + *(scratchpad_address++) = (u32) sdram_context_address;
> +}
> +
> Index: linux-omap-2.6/arch/arm/mach-omap2/sleep34xx.S
> ===================================================================
> --- linux-omap-2.6.orig/arch/arm/mach-omap2/sleep34xx.S 2008-07-01 17:21:09.043800223 +0530
> +++ linux-omap-2.6/arch/arm/mach-omap2/sleep34xx.S 2008-07-01 17:22:04.018052152 +0530
> @@ -37,12 +37,10 @@
> OMAP3430_PM_PREPWSTST)
> #define PM_PREPWSTST_MPU_V OMAP34XX_PRM_REGADDR(MPU_MOD, \
> OMAP3430_PM_PREPWSTST)
> -#define PM_PWSTCTRL_MPU_P OMAP34XX_PRM_REGADDR(MPU_MOD, PM_PWSTCTRL)
> +#define PM_PWSTCTRL_MPU_P 0x483069E0
> #define SCRATCHPAD_MEM_OFFS 0x310 /* Move this as correct place is
> * available */
> -#define SCRATCHPAD_BASE_P OMAP343X_CTRL_REGADDR(\
> - OMAP343X_CONTROL_MEM_WKUP +\
> - SCRATCHPAD_MEM_OFFS)
> +#define SCRATCHPAD_BASE_P 0x48002910
> #define SDRC_POWER_V OMAP34XX_SDRC_REGADDR(SDRC_POWER)
>
> .text
> @@ -97,7 +95,7 @@ loop:
>
> ldmfd sp!, {r0-r12, pc} @ restore regs and return
> restore:
> - /* b restore*/ @ Enable to debug restore code
> + /* b restore*/ @ Enable to debug restore code
> /* Check what was the reason for mpu reset and store the reason in r9*/
> /* 1 - Only L1 and logic lost */
> /* 2 - Only L2 lost - In this case, we wont be here */
> Index: linux-omap-2.6/include/asm-arm/arch-omap/pm.h
> ===================================================================
> --- linux-omap-2.6.orig/include/asm-arm/arch-omap/pm.h 2008-07-01 17:21:09.043800223 +0530
> +++ linux-omap-2.6/include/asm-arm/arch-omap/pm.h 2008-07-01 17:21:12.785681242 +0530
> @@ -153,6 +153,10 @@ extern void omap1510_idle_loop_suspend(v
> extern void omap1610_idle_loop_suspend(void);
> extern void omap242x_idle_loop_suspend(void);
> extern void omap243x_idle_loop_suspend(void);
> +extern void save_scratchpad_contents(void);
> +extern void clear_scratchpad_contents(void);
> +extern u32 *get_restore_pointer(void);
> +extern void vfp_enable(void);
>
> extern unsigned int omap730_cpu_suspend_sz;
> extern unsigned int omap1510_cpu_suspend_sz;
>
> --
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>
--
Jouni Högander
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