From 8005745d6eea79da8ee2e7fe978d14e412aa3353 Mon Sep 17 00:00:00 2001 From: Ben Dooks Date: Wed, 20 Jan 2010 12:29:25 +0900 Subject: ARM: SAMSUNG: Move pm-check.c to plat-samsung Move the pm-check.c file to plat-samsung for all Samsung SoC users, and update Kconfig names to make them SAMSUNG_ instead of S3C2410_ Sed expresions used to make the change: s/S3C2410_PM_DEBUG/SAMSUNG_PM_DEBUG/g s/S3C2410_PM_CHECK/SAMSUNG_PM_CHECK/g Signed-off-by: Ben Dooks diff --git a/arch/arm/configs/mini2440_defconfig b/arch/arm/configs/mini2440_defconfig index 4c46644..ff44bd1 100644 --- a/arch/arm/configs/mini2440_defconfig +++ b/arch/arm/configs/mini2440_defconfig @@ -199,8 +199,8 @@ CONFIG_S3C_BOOT_UART_FORCE_FIFO=y # # Power management # -# CONFIG_S3C2410_PM_DEBUG is not set -# CONFIG_S3C2410_PM_CHECK is not set +# CONFIG_SAMSUNG_PM_DEBUG is not set +# CONFIG_SAMSUNG_PM_CHECK is not set CONFIG_S3C_LOWLEVEL_UART_PORT=0 CONFIG_S3C_GPIO_SPACE=0 diff --git a/arch/arm/configs/s3c2410_defconfig b/arch/arm/configs/s3c2410_defconfig index 9697e97..8e94c3c 100644 --- a/arch/arm/configs/s3c2410_defconfig +++ b/arch/arm/configs/s3c2410_defconfig @@ -203,8 +203,8 @@ CONFIG_S3C_BOOT_UART_FORCE_FIFO=y # # Power management # -# CONFIG_S3C2410_PM_DEBUG is not set -# CONFIG_S3C2410_PM_CHECK is not set +# CONFIG_SAMSUNG_PM_DEBUG is not set +# CONFIG_SAMSUNG_PM_CHECK is not set CONFIG_S3C_LOWLEVEL_UART_PORT=0 CONFIG_S3C_GPIO_SPACE=0 CONFIG_S3C_DEV_HSMMC=y diff --git a/arch/arm/plat-s3c/Kconfig b/arch/arm/plat-s3c/Kconfig index 454cc39..2367908 100644 --- a/arch/arm/plat-s3c/Kconfig +++ b/arch/arm/plat-s3c/Kconfig @@ -59,50 +59,6 @@ config S3C_BOOT_UART_FORCE_FIFO Say Y here to force the UART FIFOs on during the kernel uncompressor -comment "Power management" - -config S3C2410_PM_DEBUG - bool "S3C2410 PM Suspend debug" - depends on PM - help - Say Y here if you want verbose debugging from the PM Suspend and - Resume code. See - for more information. - -config S3C_PM_DEBUG_LED_SMDK - bool "SMDK LED suspend/resume debugging" - depends on PM && (MACH_SMDK6410) - help - Say Y here to enable the use of the SMDK LEDs on the baseboard - for debugging of the state of the suspend and resume process. - - Note, this currently only works for S3C64XX based SMDK boards. - -config S3C2410_PM_CHECK - bool "S3C2410 PM Suspend Memory CRC" - depends on PM && CRC32 - help - Enable the PM code's memory area checksum over sleep. This option - will generate CRCs of all blocks of memory, and store them before - going to sleep. The blocks are then checked on resume for any - errors. - - Note, this can take several seconds depending on memory size - and CPU speed. - - See - -config S3C2410_PM_CHECK_CHUNKSIZE - int "S3C2410 PM Suspend CRC Chunksize (KiB)" - depends on PM && S3C2410_PM_CHECK - default 64 - help - Set the chunksize in Kilobytes of the CRC for checking memory - corruption over suspend and resume. A smaller value will mean that - the CRC data block will take more memory, but wil identify any - faults with better precision. - - See config S3C_LOWLEVEL_UART_PORT int "S3C UART to use for low-level messages" diff --git a/arch/arm/plat-s3c/Makefile b/arch/arm/plat-s3c/Makefile index 095bc97..89dbdb0 100644 --- a/arch/arm/plat-s3c/Makefile +++ b/arch/arm/plat-s3c/Makefile @@ -21,4 +21,3 @@ obj-$(CONFIG_S3C_DMA) += dma.o # PM support obj-$(CONFIG_PM) += pm.o -obj-$(CONFIG_S3C2410_PM_CHECK) += pm-check.o diff --git a/arch/arm/plat-s3c/include/plat/pm.h b/arch/arm/plat-s3c/include/plat/pm.h index 7a79719..2543bd2 100644 --- a/arch/arm/plat-s3c/include/plat/pm.h +++ b/arch/arm/plat-s3c/include/plat/pm.h @@ -111,7 +111,7 @@ extern int s3c24xx_irq_resume(struct sys_device *dev); /* PM debug functions */ -#ifdef CONFIG_S3C2410_PM_DEBUG +#ifdef CONFIG_SAMSUNG_PM_DEBUG /** * s3c_pm_dbg() - low level debug function for use in suspend/resume. * @msg: The message to print. @@ -141,7 +141,7 @@ static inline void s3c_pm_debug_smdkled(u32 set, u32 clear) { } /* suspend memory checking */ -#ifdef CONFIG_S3C2410_PM_CHECK +#ifdef CONFIG_SAMSUNG_PM_CHECK extern void s3c_pm_check_prepare(void); extern void s3c_pm_check_restore(void); extern void s3c_pm_check_cleanup(void); diff --git a/arch/arm/plat-s3c/pm-check.c b/arch/arm/plat-s3c/pm-check.c deleted file mode 100644 index 8eb1f43..0000000 --- a/arch/arm/plat-s3c/pm-check.c +++ /dev/null @@ -1,242 +0,0 @@ -/* linux/arch/arm/plat-s3c/pm-check.c - * originally in linux/arch/arm/plat-s3c24xx/pm.c - * - * Copyright (c) 2004-2008 Simtec Electronics - * http://armlinux.simtec.co.uk - * Ben Dooks - * - * S3C Power Mangament - suspend/resume memory corruptiuon check. - * - * 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. -*/ - -#include -#include -#include -#include -#include - -#include - -#if CONFIG_S3C2410_PM_CHECK_CHUNKSIZE < 1 -#error CONFIG_S3C2410_PM_CHECK_CHUNKSIZE must be a positive non-zero value -#endif - -/* suspend checking code... - * - * this next area does a set of crc checks over all the installed - * memory, so the system can verify if the resume was ok. - * - * CONFIG_S3C2410_PM_CHECK_CHUNKSIZE defines the block-size for the CRC, - * increasing it will mean that the area corrupted will be less easy to spot, - * and reducing the size will cause the CRC save area to grow -*/ - -#define CHECK_CHUNKSIZE (CONFIG_S3C2410_PM_CHECK_CHUNKSIZE * 1024) - -static u32 crc_size; /* size needed for the crc block */ -static u32 *crcs; /* allocated over suspend/resume */ - -typedef u32 *(run_fn_t)(struct resource *ptr, u32 *arg); - -/* s3c_pm_run_res - * - * go through the given resource list, and look for system ram -*/ - -static void s3c_pm_run_res(struct resource *ptr, run_fn_t fn, u32 *arg) -{ - while (ptr != NULL) { - if (ptr->child != NULL) - s3c_pm_run_res(ptr->child, fn, arg); - - if ((ptr->flags & IORESOURCE_MEM) && - strcmp(ptr->name, "System RAM") == 0) { - S3C_PMDBG("Found system RAM at %08lx..%08lx\n", - (unsigned long)ptr->start, - (unsigned long)ptr->end); - arg = (fn)(ptr, arg); - } - - ptr = ptr->sibling; - } -} - -static void s3c_pm_run_sysram(run_fn_t fn, u32 *arg) -{ - s3c_pm_run_res(&iomem_resource, fn, arg); -} - -static u32 *s3c_pm_countram(struct resource *res, u32 *val) -{ - u32 size = (u32)(res->end - res->start)+1; - - size += CHECK_CHUNKSIZE-1; - size /= CHECK_CHUNKSIZE; - - S3C_PMDBG("Area %08lx..%08lx, %d blocks\n", - (unsigned long)res->start, (unsigned long)res->end, size); - - *val += size * sizeof(u32); - return val; -} - -/* s3c_pm_prepare_check - * - * prepare the necessary information for creating the CRCs. This - * must be done before the final save, as it will require memory - * allocating, and thus touching bits of the kernel we do not - * know about. -*/ - -void s3c_pm_check_prepare(void) -{ - crc_size = 0; - - s3c_pm_run_sysram(s3c_pm_countram, &crc_size); - - S3C_PMDBG("s3c_pm_prepare_check: %u checks needed\n", crc_size); - - crcs = kmalloc(crc_size+4, GFP_KERNEL); - if (crcs == NULL) - printk(KERN_ERR "Cannot allocated CRC save area\n"); -} - -static u32 *s3c_pm_makecheck(struct resource *res, u32 *val) -{ - unsigned long addr, left; - - for (addr = res->start; addr < res->end; - addr += CHECK_CHUNKSIZE) { - left = res->end - addr; - - if (left > CHECK_CHUNKSIZE) - left = CHECK_CHUNKSIZE; - - *val = crc32_le(~0, phys_to_virt(addr), left); - val++; - } - - return val; -} - -/* s3c_pm_check_store - * - * compute the CRC values for the memory blocks before the final - * sleep. -*/ - -void s3c_pm_check_store(void) -{ - if (crcs != NULL) - s3c_pm_run_sysram(s3c_pm_makecheck, crcs); -} - -/* in_region - * - * return TRUE if the area defined by ptr..ptr+size contains the - * what..what+whatsz -*/ - -static inline int in_region(void *ptr, int size, void *what, size_t whatsz) -{ - if ((what+whatsz) < ptr) - return 0; - - if (what > (ptr+size)) - return 0; - - return 1; -} - -/** - * s3c_pm_runcheck() - helper to check a resource on restore. - * @res: The resource to check - * @vak: Pointer to list of CRC32 values to check. - * - * Called from the s3c_pm_check_restore() via s3c_pm_run_sysram(), this - * function runs the given memory resource checking it against the stored - * CRC to ensure that memory is restored. The function tries to skip as - * many of the areas used during the suspend process. - */ -static u32 *s3c_pm_runcheck(struct resource *res, u32 *val) -{ - void *save_at = phys_to_virt(s3c_sleep_save_phys); - unsigned long addr; - unsigned long left; - void *stkpage; - void *ptr; - u32 calc; - - stkpage = (void *)((u32)&calc & ~PAGE_MASK); - - for (addr = res->start; addr < res->end; - addr += CHECK_CHUNKSIZE) { - left = res->end - addr; - - if (left > CHECK_CHUNKSIZE) - left = CHECK_CHUNKSIZE; - - ptr = phys_to_virt(addr); - - if (in_region(ptr, left, stkpage, 4096)) { - S3C_PMDBG("skipping %08lx, has stack in\n", addr); - goto skip_check; - } - - if (in_region(ptr, left, crcs, crc_size)) { - S3C_PMDBG("skipping %08lx, has crc block in\n", addr); - goto skip_check; - } - - if (in_region(ptr, left, save_at, 32*4 )) { - S3C_PMDBG("skipping %08lx, has save block in\n", addr); - goto skip_check; - } - - /* calculate and check the checksum */ - - calc = crc32_le(~0, ptr, left); - if (calc != *val) { - printk(KERN_ERR "Restore CRC error at " - "%08lx (%08x vs %08x)\n", addr, calc, *val); - - S3C_PMDBG("Restore CRC error at %08lx (%08x vs %08x)\n", - addr, calc, *val); - } - - skip_check: - val++; - } - - return val; -} - -/** - * s3c_pm_check_restore() - memory check called on resume - * - * check the CRCs after the restore event and free the memory used - * to hold them -*/ -void s3c_pm_check_restore(void) -{ - if (crcs != NULL) - s3c_pm_run_sysram(s3c_pm_runcheck, crcs); -} - -/** - * s3c_pm_check_cleanup() - free memory resources - * - * Free the resources that where allocated by the suspend - * memory check code. We do this separately from the - * s3c_pm_check_restore() function as we cannot call any - * functions that might sleep during that resume. - */ -void s3c_pm_check_cleanup(void) -{ - kfree(crcs); - crcs = NULL; -} - diff --git a/arch/arm/plat-s3c/pm.c b/arch/arm/plat-s3c/pm.c index 7674706..e5eef126 100644 --- a/arch/arm/plat-s3c/pm.c +++ b/arch/arm/plat-s3c/pm.c @@ -41,7 +41,7 @@ unsigned long s3c_pm_flags; * resume before the console layer is available. */ -#ifdef CONFIG_S3C2410_PM_DEBUG +#ifdef CONFIG_SAMSUNG_PM_DEBUG extern void printascii(const char *); void s3c_pm_dbg(const char *fmt, ...) @@ -65,13 +65,13 @@ static inline void s3c_pm_debug_init(void) #else #define s3c_pm_debug_init() do { } while(0) -#endif /* CONFIG_S3C2410_PM_DEBUG */ +#endif /* CONFIG_SAMSUNG_PM_DEBUG */ /* Save the UART configurations if we are configured for debug. */ unsigned char pm_uart_udivslot; -#ifdef CONFIG_S3C2410_PM_DEBUG +#ifdef CONFIG_SAMSUNG_PM_DEBUG struct pm_uart_save uart_save[CONFIG_SERIAL_SAMSUNG_UARTS]; diff --git a/arch/arm/plat-samsung/Kconfig b/arch/arm/plat-samsung/Kconfig index 6484b5b..1c2fe91 100644 --- a/arch/arm/plat-samsung/Kconfig +++ b/arch/arm/plat-samsung/Kconfig @@ -132,4 +132,49 @@ config S3C_DEV_NAND help Compile in platform device definition for NAND controller +comment "Power management" + +config SAMSUNG_PM_DEBUG + bool "S3C2410 PM Suspend debug" + depends on PM + help + Say Y here if you want verbose debugging from the PM Suspend and + Resume code. See + for more information. + +config S3C_PM_DEBUG_LED_SMDK + bool "SMDK LED suspend/resume debugging" + depends on PM && (MACH_SMDK6410) + help + Say Y here to enable the use of the SMDK LEDs on the baseboard + for debugging of the state of the suspend and resume process. + + Note, this currently only works for S3C64XX based SMDK boards. + +config SAMSUNG_PM_CHECK + bool "S3C2410 PM Suspend Memory CRC" + depends on PM && CRC32 + help + Enable the PM code's memory area checksum over sleep. This option + will generate CRCs of all blocks of memory, and store them before + going to sleep. The blocks are then checked on resume for any + errors. + + Note, this can take several seconds depending on memory size + and CPU speed. + + See + +config SAMSUNG_PM_CHECK_CHUNKSIZE + int "S3C2410 PM Suspend CRC Chunksize (KiB)" + depends on PM && SAMSUNG_PM_CHECK + default 64 + help + Set the chunksize in Kilobytes of the CRC for checking memory + corruption over suspend and resume. A smaller value will mean that + the CRC data block will take more memory, but wil identify any + faults with better precision. + + See + endif diff --git a/arch/arm/plat-samsung/Makefile b/arch/arm/plat-samsung/Makefile index f31e64f..c8c8cae 100644 --- a/arch/arm/plat-samsung/Makefile +++ b/arch/arm/plat-samsung/Makefile @@ -42,6 +42,7 @@ obj-$(CONFIG_S3C_DEV_NAND) += dev-nand.o # PM support obj-$(CONFIG_PM) += pm-gpio.o +obj-$(CONFIG_SAMSUNG_PM_CHECK) += pm-check.o # PWM support diff --git a/arch/arm/plat-samsung/pm-check.c b/arch/arm/plat-samsung/pm-check.c new file mode 100644 index 0000000..0b5bb77 --- /dev/null +++ b/arch/arm/plat-samsung/pm-check.c @@ -0,0 +1,242 @@ +/* linux/arch/arm/plat-s3c/pm-check.c + * originally in linux/arch/arm/plat-s3c24xx/pm.c + * + * Copyright (c) 2004-2008 Simtec Electronics + * http://armlinux.simtec.co.uk + * Ben Dooks + * + * S3C Power Mangament - suspend/resume memory corruptiuon check. + * + * 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. +*/ + +#include +#include +#include +#include +#include + +#include + +#if CONFIG_SAMSUNG_PM_CHECK_CHUNKSIZE < 1 +#error CONFIG_SAMSUNG_PM_CHECK_CHUNKSIZE must be a positive non-zero value +#endif + +/* suspend checking code... + * + * this next area does a set of crc checks over all the installed + * memory, so the system can verify if the resume was ok. + * + * CONFIG_SAMSUNG_PM_CHECK_CHUNKSIZE defines the block-size for the CRC, + * increasing it will mean that the area corrupted will be less easy to spot, + * and reducing the size will cause the CRC save area to grow +*/ + +#define CHECK_CHUNKSIZE (CONFIG_SAMSUNG_PM_CHECK_CHUNKSIZE * 1024) + +static u32 crc_size; /* size needed for the crc block */ +static u32 *crcs; /* allocated over suspend/resume */ + +typedef u32 *(run_fn_t)(struct resource *ptr, u32 *arg); + +/* s3c_pm_run_res + * + * go through the given resource list, and look for system ram +*/ + +static void s3c_pm_run_res(struct resource *ptr, run_fn_t fn, u32 *arg) +{ + while (ptr != NULL) { + if (ptr->child != NULL) + s3c_pm_run_res(ptr->child, fn, arg); + + if ((ptr->flags & IORESOURCE_MEM) && + strcmp(ptr->name, "System RAM") == 0) { + S3C_PMDBG("Found system RAM at %08lx..%08lx\n", + (unsigned long)ptr->start, + (unsigned long)ptr->end); + arg = (fn)(ptr, arg); + } + + ptr = ptr->sibling; + } +} + +static void s3c_pm_run_sysram(run_fn_t fn, u32 *arg) +{ + s3c_pm_run_res(&iomem_resource, fn, arg); +} + +static u32 *s3c_pm_countram(struct resource *res, u32 *val) +{ + u32 size = (u32)(res->end - res->start)+1; + + size += CHECK_CHUNKSIZE-1; + size /= CHECK_CHUNKSIZE; + + S3C_PMDBG("Area %08lx..%08lx, %d blocks\n", + (unsigned long)res->start, (unsigned long)res->end, size); + + *val += size * sizeof(u32); + return val; +} + +/* s3c_pm_prepare_check + * + * prepare the necessary information for creating the CRCs. This + * must be done before the final save, as it will require memory + * allocating, and thus touching bits of the kernel we do not + * know about. +*/ + +void s3c_pm_check_prepare(void) +{ + crc_size = 0; + + s3c_pm_run_sysram(s3c_pm_countram, &crc_size); + + S3C_PMDBG("s3c_pm_prepare_check: %u checks needed\n", crc_size); + + crcs = kmalloc(crc_size+4, GFP_KERNEL); + if (crcs == NULL) + printk(KERN_ERR "Cannot allocated CRC save area\n"); +} + +static u32 *s3c_pm_makecheck(struct resource *res, u32 *val) +{ + unsigned long addr, left; + + for (addr = res->start; addr < res->end; + addr += CHECK_CHUNKSIZE) { + left = res->end - addr; + + if (left > CHECK_CHUNKSIZE) + left = CHECK_CHUNKSIZE; + + *val = crc32_le(~0, phys_to_virt(addr), left); + val++; + } + + return val; +} + +/* s3c_pm_check_store + * + * compute the CRC values for the memory blocks before the final + * sleep. +*/ + +void s3c_pm_check_store(void) +{ + if (crcs != NULL) + s3c_pm_run_sysram(s3c_pm_makecheck, crcs); +} + +/* in_region + * + * return TRUE if the area defined by ptr..ptr+size contains the + * what..what+whatsz +*/ + +static inline int in_region(void *ptr, int size, void *what, size_t whatsz) +{ + if ((what+whatsz) < ptr) + return 0; + + if (what > (ptr+size)) + return 0; + + return 1; +} + +/** + * s3c_pm_runcheck() - helper to check a resource on restore. + * @res: The resource to check + * @vak: Pointer to list of CRC32 values to check. + * + * Called from the s3c_pm_check_restore() via s3c_pm_run_sysram(), this + * function runs the given memory resource checking it against the stored + * CRC to ensure that memory is restored. The function tries to skip as + * many of the areas used during the suspend process. + */ +static u32 *s3c_pm_runcheck(struct resource *res, u32 *val) +{ + void *save_at = phys_to_virt(s3c_sleep_save_phys); + unsigned long addr; + unsigned long left; + void *stkpage; + void *ptr; + u32 calc; + + stkpage = (void *)((u32)&calc & ~PAGE_MASK); + + for (addr = res->start; addr < res->end; + addr += CHECK_CHUNKSIZE) { + left = res->end - addr; + + if (left > CHECK_CHUNKSIZE) + left = CHECK_CHUNKSIZE; + + ptr = phys_to_virt(addr); + + if (in_region(ptr, left, stkpage, 4096)) { + S3C_PMDBG("skipping %08lx, has stack in\n", addr); + goto skip_check; + } + + if (in_region(ptr, left, crcs, crc_size)) { + S3C_PMDBG("skipping %08lx, has crc block in\n", addr); + goto skip_check; + } + + if (in_region(ptr, left, save_at, 32*4 )) { + S3C_PMDBG("skipping %08lx, has save block in\n", addr); + goto skip_check; + } + + /* calculate and check the checksum */ + + calc = crc32_le(~0, ptr, left); + if (calc != *val) { + printk(KERN_ERR "Restore CRC error at " + "%08lx (%08x vs %08x)\n", addr, calc, *val); + + S3C_PMDBG("Restore CRC error at %08lx (%08x vs %08x)\n", + addr, calc, *val); + } + + skip_check: + val++; + } + + return val; +} + +/** + * s3c_pm_check_restore() - memory check called on resume + * + * check the CRCs after the restore event and free the memory used + * to hold them +*/ +void s3c_pm_check_restore(void) +{ + if (crcs != NULL) + s3c_pm_run_sysram(s3c_pm_runcheck, crcs); +} + +/** + * s3c_pm_check_cleanup() - free memory resources + * + * Free the resources that where allocated by the suspend + * memory check code. We do this separately from the + * s3c_pm_check_restore() function as we cannot call any + * functions that might sleep during that resume. + */ +void s3c_pm_check_cleanup(void) +{ + kfree(crcs); + crcs = NULL; +} + -- cgit v0.10.2