diff options
Diffstat (limited to 'arch/mips')
25 files changed, 515 insertions, 175 deletions
diff --git a/arch/mips/alchemy/common/power.c b/arch/mips/alchemy/common/power.c index 14eb8c4..5ef06a1 100644 --- a/arch/mips/alchemy/common/power.c +++ b/arch/mips/alchemy/common/power.c @@ -193,9 +193,15 @@ static void restore_core_regs(void) void au_sleep(void) { - save_core_regs(); - au1xxx_save_and_sleep(); - restore_core_regs(); + int cpuid = alchemy_get_cputype(); + if (cpuid != ALCHEMY_CPU_UNKNOWN) { + save_core_regs(); + if (cpuid <= ALCHEMY_CPU_AU1500) + alchemy_sleep_au1000(); + else if (cpuid <= ALCHEMY_CPU_AU1200) + alchemy_sleep_au1550(); + restore_core_regs(); + } } #endif /* CONFIG_PM */ diff --git a/arch/mips/alchemy/common/sleeper.S b/arch/mips/alchemy/common/sleeper.S index 4f4b167..77f3c74 100644 --- a/arch/mips/alchemy/common/sleeper.S +++ b/arch/mips/alchemy/common/sleeper.S @@ -22,10 +22,9 @@ .set noat .align 5 -/* Save all of the processor general registers and go to sleep. - * A wakeup condition will get us back here to restore the registers. - */ -LEAF(au1xxx_save_and_sleep) + +/* preparatory stuff */ +.macro SETUP_SLEEP subu sp, PT_SIZE sw $1, PT_R1(sp) sw $2, PT_R2(sp) @@ -69,12 +68,32 @@ LEAF(au1xxx_save_and_sleep) */ lui t3, 0xb190 /* sys_xxx */ sw sp, 0x0018(t3) - la k0, 3f /* resume path */ + la k0, alchemy_sleep_wakeup /* resume path */ sw k0, 0x001c(t3) +.endm - /* Put SDRAM into self refresh: Preload instructions into cache, - * issue a precharge, auto/self refresh, then sleep commands to it. - */ +.macro DO_SLEEP + /* put power supply and processor to sleep */ + sw zero, 0x0078(t3) /* sys_slppwr */ + sync + sw zero, 0x007c(t3) /* sys_sleep */ + sync + nop + nop + nop + nop + nop + nop + nop + nop +.endm + +/* sleep code for Au1000/Au1100/Au1500 memory controller type */ +LEAF(alchemy_sleep_au1000) + + SETUP_SLEEP + + /* cache following instructions, as memory gets put to sleep */ la t0, 1f .set mips3 cache 0x14, 0(t0) @@ -84,17 +103,32 @@ LEAF(au1xxx_save_and_sleep) .set mips0 1: lui a0, 0xb400 /* mem_xxx */ -#if defined(CONFIG_SOC_AU1000) || defined(CONFIG_SOC_AU1100) || \ - defined(CONFIG_SOC_AU1500) sw zero, 0x001c(a0) /* Precharge */ sync sw zero, 0x0020(a0) /* Auto Refresh */ sync sw zero, 0x0030(a0) /* Sleep */ sync -#endif -#if defined(CONFIG_SOC_AU1550) || defined(CONFIG_SOC_AU1200) + DO_SLEEP + +END(alchemy_sleep_au1000) + +/* sleep code for Au1550/Au1200 memory controller type */ +LEAF(alchemy_sleep_au1550) + + SETUP_SLEEP + + /* cache following instructions, as memory gets put to sleep */ + la t0, 1f + .set mips3 + cache 0x14, 0(t0) + cache 0x14, 32(t0) + cache 0x14, 64(t0) + cache 0x14, 96(t0) + .set mips0 + +1: lui a0, 0xb400 /* mem_xxx */ sw zero, 0x08c0(a0) /* Precharge */ sync sw zero, 0x08d0(a0) /* Self Refresh */ @@ -114,26 +148,17 @@ LEAF(au1xxx_save_and_sleep) and t1, t0, t1 /* clear CE[1:0] */ sw t1, 0x0840(a0) /* mem_sdconfiga */ sync -#endif - /* put power supply and processor to sleep */ - sw zero, 0x0078(t3) /* sys_slppwr */ - sync - sw zero, 0x007c(t3) /* sys_sleep */ - sync - nop - nop - nop - nop - nop - nop - nop - nop + DO_SLEEP + +END(alchemy_sleep_au1550) + /* This is where we return upon wakeup. * Reload all of the registers and return. */ -3: lw k0, 0x20(sp) +LEAF(alchemy_sleep_wakeup) + lw k0, 0x20(sp) mtc0 k0, CP0_STATUS lw k0, 0x1c(sp) mtc0 k0, CP0_CONTEXT @@ -169,4 +194,4 @@ LEAF(au1xxx_save_and_sleep) lw $31, PT_R31(sp) jr ra addiu sp, PT_SIZE -END(au1xxx_save_and_sleep) +END(alchemy_sleep_wakeup) diff --git a/arch/mips/ar7/platform.c b/arch/mips/ar7/platform.c index 566f2d7..8f31d1d 100644 --- a/arch/mips/ar7/platform.c +++ b/arch/mips/ar7/platform.c @@ -542,7 +542,7 @@ static int __init ar7_register_uarts(void) if (IS_ERR(bus_clk)) panic("unable to get bus clk\n"); - uart_port.type = PORT_16550A; + uart_port.type = PORT_AR7; uart_port.uartclk = clk_get_rate(bus_clk) / 2; uart_port.iotype = UPIO_MEM32; uart_port.regshift = 2; diff --git a/arch/mips/bcm47xx/Makefile b/arch/mips/bcm47xx/Makefile index 35294b1..7465e8a 100644 --- a/arch/mips/bcm47xx/Makefile +++ b/arch/mips/bcm47xx/Makefile @@ -3,4 +3,4 @@ # under Linux. # -obj-y := gpio.o irq.o prom.o serial.o setup.o time.o wgt634u.o +obj-y := gpio.o irq.o nvram.o prom.o serial.o setup.o time.o wgt634u.o diff --git a/arch/mips/bcm47xx/nvram.c b/arch/mips/bcm47xx/nvram.c new file mode 100644 index 0000000..06e03b2 --- /dev/null +++ b/arch/mips/bcm47xx/nvram.c @@ -0,0 +1,94 @@ +/* + * BCM947xx nvram variable access + * + * Copyright (C) 2005 Broadcom Corporation + * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/init.h> +#include <linux/types.h> +#include <linux/module.h> +#include <linux/ssb/ssb.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <asm/addrspace.h> +#include <asm/mach-bcm47xx/nvram.h> +#include <asm/mach-bcm47xx/bcm47xx.h> + +static char nvram_buf[NVRAM_SPACE]; + +/* Probe for NVRAM header */ +static void __init early_nvram_init(void) +{ + struct ssb_mipscore *mcore = &ssb_bcm47xx.mipscore; + struct nvram_header *header; + int i; + u32 base, lim, off; + u32 *src, *dst; + + base = mcore->flash_window; + lim = mcore->flash_window_size; + + off = FLASH_MIN; + while (off <= lim) { + /* Windowed flash access */ + header = (struct nvram_header *) + KSEG1ADDR(base + off - NVRAM_SPACE); + if (header->magic == NVRAM_HEADER) + goto found; + off <<= 1; + } + + /* Try embedded NVRAM at 4 KB and 1 KB as last resorts */ + header = (struct nvram_header *) KSEG1ADDR(base + 4096); + if (header->magic == NVRAM_HEADER) + goto found; + + header = (struct nvram_header *) KSEG1ADDR(base + 1024); + if (header->magic == NVRAM_HEADER) + goto found; + + return; + +found: + src = (u32 *) header; + dst = (u32 *) nvram_buf; + for (i = 0; i < sizeof(struct nvram_header); i += 4) + *dst++ = *src++; + for (; i < header->len && i < NVRAM_SPACE; i += 4) + *dst++ = le32_to_cpu(*src++); +} + +int nvram_getenv(char *name, char *val, size_t val_len) +{ + char *var, *value, *end, *eq; + + if (!name) + return 1; + + if (!nvram_buf[0]) + early_nvram_init(); + + /* Look for name=value and return value */ + var = &nvram_buf[sizeof(struct nvram_header)]; + end = nvram_buf + sizeof(nvram_buf) - 2; + end[0] = end[1] = '\0'; + for (; *var; var = value + strlen(value) + 1) { + eq = strchr(var, '='); + if (!eq) + break; + value = eq + 1; + if ((eq - var) == strlen(name) && + strncmp(var, name, (eq - var)) == 0) { + snprintf(val, val_len, "%s", value); + return 0; + } + } + return 1; +} +EXPORT_SYMBOL(nvram_getenv); diff --git a/arch/mips/bcm47xx/setup.c b/arch/mips/bcm47xx/setup.c index d442e11..b1aee33 100644 --- a/arch/mips/bcm47xx/setup.c +++ b/arch/mips/bcm47xx/setup.c @@ -1,8 +1,8 @@ /* * Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org> - * Copyright (C) 2005 Waldemar Brodkorb <wbx@openwrt.org> * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org> * Copyright (C) 2006 Michael Buesch <mb@bu3sch.de> + * Copyright (C) 2010 Waldemar Brodkorb <wbx@openadk.org> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the @@ -33,6 +33,7 @@ #include <asm/time.h> #include <bcm47xx.h> #include <asm/fw/cfe/cfe_api.h> +#include <asm/mach-bcm47xx/nvram.h> struct ssb_bus ssb_bcm47xx; EXPORT_SYMBOL(ssb_bcm47xx); @@ -81,28 +82,42 @@ static int bcm47xx_get_invariants(struct ssb_bus *bus, /* Fill boardinfo structure */ memset(&(iv->boardinfo), 0 , sizeof(struct ssb_boardinfo)); - if (cfe_getenv("boardvendor", buf, sizeof(buf)) >= 0) + if (cfe_getenv("boardvendor", buf, sizeof(buf)) >= 0 || + nvram_getenv("boardvendor", buf, sizeof(buf)) >= 0) iv->boardinfo.type = (u16)simple_strtoul(buf, NULL, 0); - if (cfe_getenv("boardtype", buf, sizeof(buf)) >= 0) + if (cfe_getenv("boardtype", buf, sizeof(buf)) >= 0 || + nvram_getenv("boardtype", buf, sizeof(buf)) >= 0) iv->boardinfo.type = (u16)simple_strtoul(buf, NULL, 0); - if (cfe_getenv("boardrev", buf, sizeof(buf)) >= 0) + if (cfe_getenv("boardrev", buf, sizeof(buf)) >= 0 || + nvram_getenv("boardrev", buf, sizeof(buf)) >= 0) iv->boardinfo.rev = (u16)simple_strtoul(buf, NULL, 0); /* Fill sprom structure */ memset(&(iv->sprom), 0, sizeof(struct ssb_sprom)); iv->sprom.revision = 3; - if (cfe_getenv("et0macaddr", buf, sizeof(buf)) >= 0) + if (cfe_getenv("et0macaddr", buf, sizeof(buf)) >= 0 || + nvram_getenv("et0macaddr", buf, sizeof(buf)) >= 0) str2eaddr(buf, iv->sprom.et0mac); - if (cfe_getenv("et1macaddr", buf, sizeof(buf)) >= 0) + + if (cfe_getenv("et1macaddr", buf, sizeof(buf)) >= 0 || + nvram_getenv("et1macaddr", buf, sizeof(buf)) >= 0) str2eaddr(buf, iv->sprom.et1mac); - if (cfe_getenv("et0phyaddr", buf, sizeof(buf)) >= 0) - iv->sprom.et0phyaddr = simple_strtoul(buf, NULL, 10); - if (cfe_getenv("et1phyaddr", buf, sizeof(buf)) >= 0) - iv->sprom.et1phyaddr = simple_strtoul(buf, NULL, 10); - if (cfe_getenv("et0mdcport", buf, sizeof(buf)) >= 0) + + if (cfe_getenv("et0phyaddr", buf, sizeof(buf)) >= 0 || + nvram_getenv("et0phyaddr", buf, sizeof(buf)) >= 0) + iv->sprom.et0phyaddr = simple_strtoul(buf, NULL, 0); + + if (cfe_getenv("et1phyaddr", buf, sizeof(buf)) >= 0 || + nvram_getenv("et1phyaddr", buf, sizeof(buf)) >= 0) + iv->sprom.et1phyaddr = simple_strtoul(buf, NULL, 0); + + if (cfe_getenv("et0mdcport", buf, sizeof(buf)) >= 0 || + nvram_getenv("et0mdcport", buf, sizeof(buf)) >= 0) iv->sprom.et0mdcport = simple_strtoul(buf, NULL, 10); - if (cfe_getenv("et1mdcport", buf, sizeof(buf)) >= 0) + + if (cfe_getenv("et1mdcport", buf, sizeof(buf)) >= 0 || + nvram_getenv("et1mdcport", buf, sizeof(buf)) >= 0) iv->sprom.et1mdcport = simple_strtoul(buf, NULL, 10); return 0; diff --git a/arch/mips/include/asm/mach-ar7/ar7.h b/arch/mips/include/asm/mach-ar7/ar7.h index f1cf389..483ffea 100644 --- a/arch/mips/include/asm/mach-ar7/ar7.h +++ b/arch/mips/include/asm/mach-ar7/ar7.h @@ -50,7 +50,7 @@ #define UR8_REGS_WDT (AR7_REGS_BASE + 0x0b00) #define UR8_REGS_UART1 (AR7_REGS_BASE + 0x0f00) -#define AR7_RESET_PEREPHERIAL 0x0 +#define AR7_RESET_PERIPHERAL 0x0 #define AR7_RESET_SOFTWARE 0x4 #define AR7_RESET_STATUS 0x8 @@ -128,7 +128,7 @@ static inline int ar7_has_high_cpmac(void) static inline void ar7_device_enable(u32 bit) { void *reset_reg = - (void *)KSEG1ADDR(AR7_REGS_RESET + AR7_RESET_PEREPHERIAL); + (void *)KSEG1ADDR(AR7_REGS_RESET + AR7_RESET_PERIPHERAL); writel(readl(reset_reg) | (1 << bit), reset_reg); msleep(20); } @@ -136,7 +136,7 @@ static inline void ar7_device_enable(u32 bit) static inline void ar7_device_disable(u32 bit) { void *reset_reg = - (void *)KSEG1ADDR(AR7_REGS_RESET + AR7_RESET_PEREPHERIAL); + (void *)KSEG1ADDR(AR7_REGS_RESET + AR7_RESET_PERIPHERAL); writel(readl(reset_reg) & ~(1 << bit), reset_reg); msleep(20); } diff --git a/arch/mips/include/asm/mach-ar7/gpio.h b/arch/mips/include/asm/mach-ar7/gpio.h index 73f9b16..abc317c 100644 --- a/arch/mips/include/asm/mach-ar7/gpio.h +++ b/arch/mips/include/asm/mach-ar7/gpio.h @@ -24,7 +24,7 @@ #define AR7_GPIO_MAX 32 #define NR_BUILTIN_GPIO AR7_GPIO_MAX -#define gpio_to_irq(gpio) NULL +#define gpio_to_irq(gpio) -1 #define gpio_get_value __gpio_get_value #define gpio_set_value __gpio_set_value diff --git a/arch/mips/include/asm/mach-au1x00/au1000.h b/arch/mips/include/asm/mach-au1x00/au1000.h index e76941db..a697661 100644 --- a/arch/mips/include/asm/mach-au1x00/au1000.h +++ b/arch/mips/include/asm/mach-au1x00/au1000.h @@ -188,7 +188,8 @@ extern unsigned long get_au1x00_uart_baud_base(void); extern unsigned long au1xxx_calc_clock(void); /* PM: arch/mips/alchemy/common/sleeper.S, power.c, irq.c */ -void au1xxx_save_and_sleep(void); +void alchemy_sleep_au1000(void); +void alchemy_sleep_au1550(void); void au_sleep(void); diff --git a/arch/mips/include/asm/mach-bcm47xx/nvram.h b/arch/mips/include/asm/mach-bcm47xx/nvram.h new file mode 100644 index 0000000..0d8cc14 --- /dev/null +++ b/arch/mips/include/asm/mach-bcm47xx/nvram.h @@ -0,0 +1,36 @@ +/* + * Copyright (C) 2005, Broadcom Corporation + * Copyright (C) 2006, Felix Fietkau <nbd@openwrt.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#ifndef __NVRAM_H +#define __NVRAM_H + +#include <linux/types.h> + +struct nvram_header { + u32 magic; + u32 len; + u32 crc_ver_init; /* 0:7 crc, 8:15 ver, 16:31 sdram_init */ + u32 config_refresh; /* 0:15 sdram_config, 16:31 sdram_refresh */ + u32 config_ncdl; /* ncdl values for memc */ +}; + +#define NVRAM_HEADER 0x48534C46 /* 'FLSH' */ +#define NVRAM_VERSION 1 +#define NVRAM_HEADER_SIZE 20 +#define NVRAM_SPACE 0x8000 + +#define FLASH_MIN 0x00020000 /* Minimum flash size */ + +#define NVRAM_MAX_VALUE_LEN 255 +#define NVRAM_MAX_PARAM_LEN 64 + +extern int nvram_getenv(char *name, char *val, size_t val_len); + +#endif diff --git a/arch/mips/include/asm/mach-bcm63xx/gpio.h b/arch/mips/include/asm/mach-bcm63xx/gpio.h index 7cda8c0..1eb534d 100644 --- a/arch/mips/include/asm/mach-bcm63xx/gpio.h +++ b/arch/mips/include/asm/mach-bcm63xx/gpio.h @@ -3,7 +3,7 @@ #include <bcm63xx_gpio.h> -#define gpio_to_irq(gpio) NULL +#define gpio_to_irq(gpio) -1 #define gpio_get_value __gpio_get_value #define gpio_set_value __gpio_set_value diff --git a/arch/mips/kernel/ftrace.c b/arch/mips/kernel/ftrace.c index e9e64e0..5a84a1f 100644 --- a/arch/mips/kernel/ftrace.c +++ b/arch/mips/kernel/ftrace.c @@ -2,7 +2,7 @@ * Code for replacing ftrace calls with jumps. * * Copyright (C) 2007-2008 Steven Rostedt <srostedt@redhat.com> - * Copyright (C) 2009 DSLab, Lanzhou University, China + * Copyright (C) 2009, 2010 DSLab, Lanzhou University, China * Author: Wu Zhangjin <wuzhangjin@gmail.com> * * Thanks goes to Steven Rostedt for writing the original x86 version. @@ -12,18 +12,62 @@ #include <linux/init.h> #include <linux/ftrace.h> -#include <asm/cacheflush.h> #include <asm/asm.h> #include <asm/asm-offsets.h> +#include <asm/cacheflush.h> +#include <asm/uasm.h> + +/* + * If the Instruction Pointer is in module space (0xc0000000), return true; + * otherwise, it is in kernel space (0x80000000), return false. + * + * FIXME: This will not work when the kernel space and module space are the + * same. If they are the same, we need to modify scripts/recordmcount.pl, + * ftrace_make_nop/call() and the other related parts to ensure the + * enabling/disabling of the calling site to _mcount is right for both kernel + * and module. + */ + +static inline int in_module(unsigned long ip) +{ + return ip & 0x40000000; +} #ifdef CONFIG_DYNAMIC_FTRACE #define JAL 0x0c000000 /* jump & link: ip --> ra, jump to target */ #define ADDR_MASK 0x03ffffff /* op_code|addr : 31...26|25 ....0 */ -#define jump_insn_encode(op_code, addr) \ - ((unsigned int)((op_code) | (((addr) >> 2) & ADDR_MASK))) -static unsigned int ftrace_nop = 0x00000000; +#define INSN_B_1F_4 0x10000004 /* b 1f; offset = 4 */ +#define INSN_B_1F_5 0x10000005 /* b 1f; offset = 5 */ +#define INSN_NOP 0x00000000 /* nop */ +#define INSN_JAL(addr) \ + ((unsigned int)(JAL | (((addr) >> 2) & ADDR_MASK))) + +static unsigned int insn_jal_ftrace_caller __read_mostly; +static unsigned int insn_lui_v1_hi16_mcount __read_mostly; +static unsigned int insn_j_ftrace_graph_caller __maybe_unused __read_mostly; + +static inline void ftrace_dyn_arch_init_insns(void) +{ + u32 *buf; + unsigned int v1; + + /* lui v1, hi16_mcount */ + v1 = 3; + buf = (u32 *)&insn_lui_v1_hi16_mcount; + UASM_i_LA_mostly(&buf, v1, MCOUNT_ADDR); + + /* jal (ftrace_caller + 8), jump over the first two instruction */ + buf = (u32 *)&insn_jal_ftrace_caller; + uasm_i_jal(&buf, (FTRACE_ADDR + 8)); + +#ifdef CONFIG_FUNCTION_GRAPH_TRACER + /* j ftrace_graph_caller */ + buf = (u32 *)&insn_j_ftrace_graph_caller; + uasm_i_j(&buf, (unsigned long)ftrace_graph_caller); +#endif +} static int ftrace_modify_code(unsigned long ip, unsigned int new_code) { @@ -40,67 +84,56 @@ static int ftrace_modify_code(unsigned long ip, unsigned int new_code) return 0; } -static int lui_v1; -static int jal_mcount; - int ftrace_make_nop(struct module *mod, struct dyn_ftrace *rec, unsigned long addr) { unsigned int new; - int faulted; unsigned long ip = rec->ip; - /* We have compiled module with -mlong-calls, but compiled the kernel - * without it, we need to cope with them respectively. */ - if (ip & 0x40000000) { - /* record it for ftrace_make_call */ - if (lui_v1 == 0) { - /* lui_v1 = *(unsigned int *)ip; */ - safe_load_code(lui_v1, ip, faulted); - - if (unlikely(faulted)) - return -EFAULT; - } - - /* lui v1, hi_16bit_of_mcount --> b 1f (0x10000004) + /* + * We have compiled module with -mlong-calls, but compiled the kernel + * without it, we need to cope with them respectively. + */ + if (in_module(ip)) { +#if defined(KBUILD_MCOUNT_RA_ADDRESS) && defined(CONFIG_32BIT) + /* + * lui v1, hi_16bit_of_mcount --> b 1f (0x10000005) + * addiu v1, v1, low_16bit_of_mcount + * move at, ra + * move $12, ra_address + * jalr v1 + * sub sp, sp, 8 + * 1: offset = 5 instructions + */ + new = INSN_B_1F_5; +#else + /* + * lui v1, hi_16bit_of_mcount --> b 1f (0x10000004) * addiu v1, v1, low_16bit_of_mcount * move at, ra * jalr v1 - * nop - * 1f: (ip + 12) + * nop | move $12, ra_address | sub sp, sp, 8 + * 1: offset = 4 instructions */ - new = 0x10000004; + new = INSN_B_1F_4; +#endif } else { - /* record/calculate it for ftrace_make_call */ - if (jal_mcount == 0) { - /* We can record it directly like this: - * jal_mcount = *(unsigned int *)ip; - * Herein, jump over the first two nop instructions */ - jal_mcount = jump_insn_encode(JAL, (MCOUNT_ADDR + 8)); - } - - /* move at, ra - * jalr v1 --> nop + /* + * move at, ra + * jal _mcount --> nop */ - new = ftrace_nop; + new = INSN_NOP; } return ftrace_modify_code(ip, new); } -static int modified; /* initialized as 0 by default */ - int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr) { unsigned int new; unsigned long ip = rec->ip; - /* We just need to remove the "b ftrace_stub" at the fist time! */ - if (modified == 0) { - modified = 1; - ftrace_modify_code(addr, ftrace_nop); - } /* ip, module: 0xc0000000, kernel: 0x80000000 */ - new = (ip & 0x40000000) ? lui_v1 : jal_mcount; + new = in_module(ip) ? insn_lui_v1_hi16_mcount : insn_jal_ftrace_caller; return ftrace_modify_code(ip, new); } @@ -111,44 +144,48 @@ int ftrace_update_ftrace_func(ftrace_func_t func) { unsigned int new; - new = jump_insn_encode(JAL, (unsigned long)func); + new = INSN_JAL((unsigned long)func); return ftrace_modify_code(FTRACE_CALL_IP, new); } int __init ftrace_dyn_arch_init(void *data) { + /* Encode the instructions when booting */ + ftrace_dyn_arch_init_insns(); + + /* Remove "b ftrace_stub" to ensure ftrace_caller() is executed */ + ftrace_modify_code(MCOUNT_ADDR, INSN_NOP); + /* The return code is retured via data */ *(unsigned long *)data = 0; return 0; } -#endif /* CONFIG_DYNAMIC_FTRACE */ +#endif /* CONFIG_DYNAMIC_FTRACE */ #ifdef CONFIG_FUNCTION_GRAPH_TRACER #ifdef CONFIG_DYNAMIC_FTRACE extern void ftrace_graph_call(void); -#define JMP 0x08000000 /* jump to target directly */ -#define CALL_FTRACE_GRAPH_CALLER \ - jump_insn_encode(JMP, (unsigned long)(&ftrace_graph_caller)) #define FTRACE_GRAPH_CALL_IP ((unsigned long)(&ftrace_graph_call)) int ftrace_enable_ftrace_graph_caller(void) { return ftrace_modify_code(FTRACE_GRAPH_CALL_IP, - CALL_FTRACE_GRAPH_CALLER); + insn_j_ftrace_graph_caller); } int ftrace_disable_ftrace_graph_caller(void) { - return ftrace_modify_code(FTRACE_GRAPH_CALL_IP, ftrace_nop); + return ftrace_modify_code(FTRACE_GRAPH_CALL_IP, INSN_NOP); } -#endif /* !CONFIG_DYNAMIC_FTRACE */ +#endif /* CONFIG_DYNAMIC_FTRACE */ #ifndef KBUILD_MCOUNT_RA_ADDRESS + #define S_RA_SP (0xafbf << 16) /* s{d,w} ra, offset(sp) */ #define S_R_SP (0xafb0 << 16) /* s{d,w} R, offset(sp) */ #define OFFSET_MASK 0xffff /* stack offset range: 0 ~ PT_SIZE */ @@ -162,17 +199,17 @@ unsigned long ftrace_get_parent_addr(unsigned long self_addr, unsigned int code; int faulted; - /* in module or kernel? */ - if (self_addr & 0x40000000) { - /* module: move to the instruction "lui v1, HI_16BIT_OF_MCOUNT" */ - ip = self_addr - 20; - } else { - /* kernel: move to the instruction "move ra, at" */ - ip = self_addr - 12; - } + /* + * For module, move the ip from calling site of mcount to the + * instruction "lui v1, hi_16bit_of_mcount"(offset is 20), but for + * kernel, move to the instruction "move ra, at"(offset is 12) + */ + ip = self_addr - (in_module(self_addr) ? 20 : 12); - /* search the text until finding the non-store instruction or "s{d,w} - * ra, offset(sp)" instruction */ + /* + * search the text until finding the non-store instruction or "s{d,w} + * ra, offset(sp)" instruction + */ do { ip -= 4; @@ -181,10 +218,11 @@ unsigned long ftrace_get_parent_addr(unsigned long self_addr, if (unlikely(faulted)) return 0; - - /* If we hit the non-store instruction before finding where the + /* + * If we hit the non-store instruction before finding where the * ra is stored, then this is a leaf function and it does not - * store the ra on the stack. */ + * store the ra on the stack + */ if ((code & S_R_SP) != S_R_SP) return parent_addr; @@ -202,7 +240,7 @@ unsigned long ftrace_get_parent_addr(unsigned long self_addr, return 0; } -#endif +#endif /* !KBUILD_MCOUNT_RA_ADDRESS */ /* * Hook the return address and push it in the stack of return addrs @@ -220,7 +258,8 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr, if (unlikely(atomic_read(¤t->tracing_graph_pause))) return; - /* "parent" is the stack address saved the return address of the caller + /* + * "parent" is the stack address saved the return address of the caller * of _mcount. * * if the gcc < 4.5, a leaf function does not save the return address @@ -242,10 +281,11 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr, goto out; #ifndef KBUILD_MCOUNT_RA_ADDRESS parent = (unsigned long *)ftrace_get_parent_addr(self_addr, old, - (unsigned long)parent, - fp); - /* If fails when getting the stack address of the non-leaf function's - * ra, stop function graph tracer and return */ + (unsigned long)parent, fp); + /* + * If fails when getting the stack address of the non-leaf function's + * ra, stop function graph tracer and return + */ if (parent == 0) goto out; #endif @@ -272,4 +312,4 @@ out: ftrace_graph_stop(); WARN_ON(1); } -#endif /* CONFIG_FUNCTION_GRAPH_TRACER */ +#endif /* CONFIG_FUNCTION_GRAPH_TRACER */ diff --git a/arch/mips/kernel/mcount.S b/arch/mips/kernel/mcount.S index 6851fc9..6bfcb7a 100644 --- a/arch/mips/kernel/mcount.S +++ b/arch/mips/kernel/mcount.S @@ -6,6 +6,7 @@ * more details. * * Copyright (C) 2009 Lemote Inc. & DSLab, Lanzhou University, China + * Copyright (C) 2010 DSLab, Lanzhou University, China * Author: Wu Zhangjin <wuzhangjin@gmail.com> */ @@ -45,8 +46,6 @@ PTR_L a5, PT_R9(sp) PTR_L a6, PT_R10(sp) PTR_L a7, PT_R11(sp) -#endif -#ifdef CONFIG_64BIT PTR_ADDIU sp, PT_SIZE #else PTR_ADDIU sp, (PT_SIZE + 8) @@ -58,6 +57,12 @@ move ra, AT .endm +/* + * The -mmcount-ra-address option of gcc 4.5 uses register $12 to pass + * the location of the parent's return address. + */ +#define MCOUNT_RA_ADDRESS_REG $12 + #ifdef CONFIG_DYNAMIC_FTRACE NESTED(ftrace_caller, PT_SIZE, ra) @@ -71,14 +76,14 @@ _mcount: MCOUNT_SAVE_REGS #ifdef KBUILD_MCOUNT_RA_ADDRESS - PTR_S t0, PT_R12(sp) /* t0 saved the location of the return address(at) by -mmcount-ra-address */ + PTR_S MCOUNT_RA_ADDRESS_REG, PT_R12(sp) #endif - move a0, ra /* arg1: next ip, selfaddr */ + move a0, ra /* arg1: self return address */ .globl ftrace_call ftrace_call: nop /* a placeholder for the call to a real tracing function */ - move a1, AT /* arg2: the caller's next ip, parent */ + move a1, AT /* arg2: parent's return address */ #ifdef CONFIG_FUNCTION_GRAPH_TRACER .globl ftrace_graph_call @@ -119,9 +124,9 @@ NESTED(_mcount, PT_SIZE, ra) static_trace: MCOUNT_SAVE_REGS - move a0, ra /* arg1: next ip, selfaddr */ + move a0, ra /* arg1: self return address */ jalr t2 /* (1) call *ftrace_trace_function */ - move a1, AT /* arg2: the caller's next ip, parent */ + move a1, AT /* arg2: parent's return address */ MCOUNT_RESTORE_REGS .globl ftrace_stub @@ -134,28 +139,34 @@ ftrace_stub: #ifdef CONFIG_FUNCTION_GRAPH_TRACER NESTED(ftrace_graph_caller, PT_SIZE, ra) -#ifdef CONFIG_DYNAMIC_FTRACE - PTR_L a1, PT_R31(sp) /* load the original ra from the stack */ -#ifdef KBUILD_MCOUNT_RA_ADDRESS - PTR_L t0, PT_R12(sp) /* load the original t0 from the stack */ -#endif -#else +#ifndef CONFIG_DYNAMIC_FTRACE MCOUNT_SAVE_REGS - move a1, ra /* arg2: next ip, selfaddr */ #endif + /* arg1: Get the location of the parent's return address */ #ifdef KBUILD_MCOUNT_RA_ADDRESS - bnez t0, 1f /* non-leaf func: t0 saved the location of the return address */ +#ifdef CONFIG_DYNAMIC_FTRACE + PTR_L a0, PT_R12(sp) +#else + move a0, MCOUNT_RA_ADDRESS_REG +#endif + bnez a0, 1f /* non-leaf func: stored in MCOUNT_RA_ADDRESS_REG */ nop - PTR_LA t0, PT_R1(sp) /* leaf func: get the location of at(old ra) from our own stack */ -1: move a0, t0 /* arg1: the location of the return address */ +#endif + PTR_LA a0, PT_R1(sp) /* leaf func: the location in current stack */ +1: + + /* arg2: Get self return address */ +#ifdef CONFIG_DYNAMIC_FTRACE + PTR_L a1, PT_R31(sp) #else - PTR_LA a0, PT_R1(sp) /* arg1: &AT -> a0 */ + move a1, ra #endif - jal prepare_ftrace_return + + /* arg3: Get frame pointer of current stack */ #ifdef CONFIG_FRAME_POINTER - move a2, fp /* arg3: frame pointer */ -#else + move a2, fp +#else /* ! CONFIG_FRAME_POINTER */ #ifdef CONFIG_64BIT PTR_LA a2, PT_SIZE(sp) #else @@ -163,6 +174,8 @@ NESTED(ftrace_graph_caller, PT_SIZE, ra) #endif #endif + jal prepare_ftrace_return + nop MCOUNT_RESTORE_REGS RETURN_BACK END(ftrace_graph_caller) diff --git a/arch/mips/kernel/mips-mt-fpaff.c b/arch/mips/kernel/mips-mt-fpaff.c index f5981c4..2340f11 100644 --- a/arch/mips/kernel/mips-mt-fpaff.c +++ b/arch/mips/kernel/mips-mt-fpaff.c @@ -3,6 +3,7 @@ * Copyright (C) 2005 Mips Technologies, Inc */ #include <linux/cpu.h> +#include <linux/cpuset.h> #include <linux/cpumask.h> #include <linux/delay.h> #include <linux/kernel.h> @@ -39,6 +40,21 @@ static inline struct task_struct *find_process_by_pid(pid_t pid) return pid ? find_task_by_vpid(pid) : current; } +/* + * check the target process has a UID that matches the current process's + */ +static bool check_same_owner(struct task_struct *p) +{ + const struct cred *cred = current_cred(), *pcred; + bool match; + + rcu_read_lock(); + pcred = __task_cred(p); + match = (cred->euid == pcred->euid || + cred->euid == pcred->uid); + rcu_read_unlock(); + return match; +} /* * mipsmt_sys_sched_setaffinity - set the cpu affinity of a process @@ -46,12 +62,10 @@ static inline struct task_struct *find_process_by_pid(pid_t pid) asmlinkage long mipsmt_sys_sched_setaffinity(pid_t pid, unsigned int len, unsigned long __user *user_mask_ptr) { - cpumask_t new_mask; - cpumask_t effective_mask; - int retval; - struct task_struct *p; + cpumask_var_t cpus_allowed, new_mask, effective_mask; struct thread_info *ti; - uid_t euid; + struct task_struct *p; + int retval; if (len < sizeof(new_mask)) return -EINVAL; @@ -60,53 +74,74 @@ asmlinkage long mipsmt_sys_sched_setaffinity(pid_t pid, unsigned int len, return -EFAULT; get_online_cpus(); - read_lock(&tasklist_lock); + rcu_read_lock(); p = find_process_by_pid(pid); if (!p) { - read_unlock(&tasklist_lock); + rcu_read_unlock(); put_online_cpus(); return -ESRCH; } - /* - * It is not safe to call set_cpus_allowed with the - * tasklist_lock held. We will bump the task_struct's - * usage count and drop tasklist_lock before invoking - * set_cpus_allowed. - */ + /* Prevent p going away */ get_task_struct(p); + rcu_read_unlock(); - euid = current_euid(); + if (!alloc_cpumask_var(&cpus_allowed, GFP_KERNEL)) { + retval = -ENOMEM; + goto out_put_task; + } + if (!alloc_cpumask_var(&new_mask, GFP_KERNEL)) { + retval = -ENOMEM; + goto out_free_cpus_allowed; + } + if (!alloc_cpumask_var(&effective_mask, GFP_KERNEL)) { + retval = -ENOMEM; + goto out_free_new_mask; + } retval = -EPERM; - if (euid != p->cred->euid && euid != p->cred->uid && - !capable(CAP_SYS_NICE)) { - read_unlock(&tasklist_lock); + if (!check_same_owner(p) && !capable(CAP_SYS_NICE)) goto out_unlock; - } retval = security_task_setscheduler(p, 0, NULL); if (retval) goto out_unlock; /* Record new user-specified CPU set for future reference */ - p->thread.user_cpus_allowed = new_mask; - - /* Unlock the task list */ - read_unlock(&tasklist_lock); + cpumask_copy(&p->thread.user_cpus_allowed, new_mask); + again: /* Compute new global allowed CPU set if necessary */ ti = task_thread_info(p); if (test_ti_thread_flag(ti, TIF_FPUBOUND) && - cpus_intersects(new_mask, mt_fpu_cpumask)) { - cpus_and(effective_mask, new_mask, mt_fpu_cpumask); - retval = set_cpus_allowed_ptr(p, &effective_mask); + cpus_intersects(*new_mask, mt_fpu_cpumask)) { + cpus_and(*effective_mask, *new_mask, mt_fpu_cpumask); + retval = set_cpus_allowed_ptr(p, effective_mask); } else { + cpumask_copy(effective_mask, new_mask); clear_ti_thread_flag(ti, TIF_FPUBOUND); - retval = set_cpus_allowed_ptr(p, &new_mask); + retval = set_cpus_allowed_ptr(p, new_mask); } + if (!retval) { + cpuset_cpus_allowed(p, cpus_allowed); + if (!cpumask_subset(effective_mask, cpus_allowed)) { + /* + * We must have raced with a concurrent cpuset + * update. Just reset the cpus_allowed to the + * cpuset's cpus_allowed + */ + cpumask_copy(new_mask, cpus_allowed); + goto again; + } + } out_unlock: + free_cpumask_var(effective_mask); +out_free_new_mask: + free_cpumask_var(new_mask); +out_free_cpus_allowed: + free_cpumask_var(cpus_allowed); +out_put_task: put_task_struct(p); put_online_cpus(); return retval; diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index 8bdd6a6..8527808 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -976,7 +976,7 @@ asmlinkage void do_cpu(struct pt_regs *regs) case 2: raw_notifier_call_chain(&cu2_chain, CU2_EXCEPTION, regs); - break; + return; case 3: break; diff --git a/arch/mips/loongson/Kconfig b/arch/mips/loongson/Kconfig index 3df1967..c97ca69 100644 --- a/arch/mips/loongson/Kconfig +++ b/arch/mips/loongson/Kconfig @@ -23,6 +23,7 @@ config LEMOTE_FULOONG2E select GENERIC_HARDIRQS_NO__DO_IRQ select GENERIC_ISA_DMA_SUPPORT_BROKEN select CPU_HAS_WB + select LOONGSON_MC146818 help Lemote Fuloong(2e) mini-PC board based on the Chinese Loongson-2E CPU and an FPGA northbridge @@ -51,6 +52,7 @@ config LEMOTE_MACH2F select SYS_SUPPORTS_64BIT_KERNEL select SYS_SUPPORTS_HIGHMEM select SYS_SUPPORTS_LITTLE_ENDIAN + select LOONGSON_MC146818 help Lemote Loongson 2F family machines utilize the 2F revision of Loongson processor and the AMD CS5536 south bridge. @@ -83,3 +85,7 @@ config LOONGSON_UART_BASE bool default y depends on EARLY_PRINTK || SERIAL_8250 + +config LOONGSON_MC146818 + bool + default n diff --git a/arch/mips/loongson/common/Makefile b/arch/mips/loongson/common/Makefile index cdd2e81..e526488 100644 --- a/arch/mips/loongson/common/Makefile +++ b/arch/mips/loongson/common/Makefile @@ -12,6 +12,7 @@ obj-$(CONFIG_GENERIC_GPIO) += gpio.o obj-$(CONFIG_EARLY_PRINTK) += early_printk.o obj-$(CONFIG_SERIAL_8250) += serial.o obj-$(CONFIG_LOONGSON_UART_BASE) += uart_base.o +obj-$(CONFIG_LOONGSON_MC146818) += rtc.o # # Enable CS5536 Virtual Support Module(VSM) to virtulize the PCI configure diff --git a/arch/mips/loongson/common/cs5536/cs5536_ehci.c b/arch/mips/loongson/common/cs5536/cs5536_ehci.c index eaf8b86..5b5cbba 100644 --- a/arch/mips/loongson/common/cs5536/cs5536_ehci.c +++ b/arch/mips/loongson/common/cs5536/cs5536_ehci.c @@ -49,6 +49,8 @@ void pci_ehci_write_reg(int reg, u32 value) lo |= SOFT_BAR_EHCI_FLAG; _wrmsr(GLCP_MSR_REG(GLCP_SOFT_COM), hi, lo); } else if ((value & 0x01) == 0x00) { + _rdmsr(USB_MSR_REG(USB_EHCI), &hi, &lo); + lo = value; _wrmsr(USB_MSR_REG(USB_EHCI), hi, lo); value &= 0xfffffff0; diff --git a/arch/mips/loongson/common/cs5536/cs5536_ide.c b/arch/mips/loongson/common/cs5536/cs5536_ide.c index 9a96b56..681d129 100644 --- a/arch/mips/loongson/common/cs5536/cs5536_ide.c +++ b/arch/mips/loongson/common/cs5536/cs5536_ide.c @@ -51,6 +51,7 @@ void pci_ide_write_reg(int reg, u32 value) lo |= SOFT_BAR_IDE_FLAG; _wrmsr(GLCP_MSR_REG(GLCP_SOFT_COM), hi, lo); } else if (value & 0x01) { + _rdmsr(IDE_MSR_REG(IDE_IO_BAR), &hi, &lo); lo = (value & 0xfffffff0) | 0x1; _wrmsr(IDE_MSR_REG(IDE_IO_BAR), hi, lo); @@ -65,19 +66,30 @@ void pci_ide_write_reg(int reg, u32 value) _rdmsr(DIVIL_MSR_REG(DIVIL_BALL_OPTS), &hi, &lo); lo |= 0x01; _wrmsr(DIVIL_MSR_REG(DIVIL_BALL_OPTS), hi, lo); - } else + } else { + _rdmsr(IDE_MSR_REG(IDE_CFG), &hi, &lo); + lo = value; _wrmsr(IDE_MSR_REG(IDE_CFG), hi, lo); + } break; case PCI_IDE_DTC_REG: + _rdmsr(IDE_MSR_REG(IDE_DTC), &hi, &lo); + lo = value; _wrmsr(IDE_MSR_REG(IDE_DTC), hi, lo); break; case PCI_IDE_CAST_REG: + _rdmsr(IDE_MSR_REG(IDE_CAST), &hi, &lo); + lo = value; _wrmsr(IDE_MSR_REG(IDE_CAST), hi, lo); break; case PCI_IDE_ETC_REG: + _rdmsr(IDE_MSR_REG(IDE_ETC), &hi, &lo); + lo = value; _wrmsr(IDE_MSR_REG(IDE_ETC), hi, lo); break; case PCI_IDE_PM_REG: + _rdmsr(IDE_MSR_REG(IDE_INTERNAL_PM), &hi, &lo); + lo = value; _wrmsr(IDE_MSR_REG(IDE_INTERNAL_PM), hi, lo); break; default: @@ -167,6 +179,7 @@ u32 pci_ide_read_reg(int reg) case PCI_IDE_ETC_REG: _rdmsr(IDE_MSR_REG(IDE_ETC), &hi, &lo); conf_data = lo; + break; case PCI_IDE_PM_REG: _rdmsr(IDE_MSR_REG(IDE_INTERNAL_PM), &hi, &lo); conf_data = lo; diff --git a/arch/mips/loongson/common/cs5536/cs5536_isa.c b/arch/mips/loongson/common/cs5536/cs5536_isa.c index f5c0818..4d9f65a 100644 --- a/arch/mips/loongson/common/cs5536/cs5536_isa.c +++ b/arch/mips/loongson/common/cs5536/cs5536_isa.c @@ -61,7 +61,7 @@ static void divil_lbar_enable(void) for (offset = DIVIL_LBAR_SMB; offset <= DIVIL_LBAR_PMS; offset++) { _rdmsr(DIVIL_MSR_REG(offset), &hi, &lo); hi |= 0x01; - _wrmsr(DIVIL_MSR_REG(DIVIL_LBAR_SMB), hi, lo); + _wrmsr(DIVIL_MSR_REG(offset), hi, lo); } } @@ -76,7 +76,7 @@ static void divil_lbar_disable(void) for (offset = DIVIL_LBAR_SMB; offset <= DIVIL_LBAR_PMS; offset++) { _rdmsr(DIVIL_MSR_REG(offset), &hi, &lo); hi &= ~0x01; - _wrmsr(DIVIL_MSR_REG(DIVIL_LBAR_SMB), hi, lo); + _wrmsr(DIVIL_MSR_REG(offset), hi, lo); } } diff --git a/arch/mips/loongson/common/cs5536/cs5536_ohci.c b/arch/mips/loongson/common/cs5536/cs5536_ohci.c index db5900aad..bdedf51 100644 --- a/arch/mips/loongson/common/cs5536/cs5536_ohci.c +++ b/arch/mips/loongson/common/cs5536/cs5536_ohci.c @@ -49,6 +49,8 @@ void pci_ohci_write_reg(int reg, u32 value) lo |= SOFT_BAR_OHCI_FLAG; _wrmsr(GLCP_MSR_REG(GLCP_SOFT_COM), hi, lo); } else if ((value & 0x01) == 0x00) { + _rdmsr(USB_MSR_REG(USB_OHCI), &hi, &lo); + lo = value; _wrmsr(USB_MSR_REG(USB_OHCI), hi, lo); value &= 0xfffffff0; diff --git a/arch/mips/loongson/common/rtc.c b/arch/mips/loongson/common/rtc.c new file mode 100644 index 0000000..a90d87c --- /dev/null +++ b/arch/mips/loongson/common/rtc.c @@ -0,0 +1,43 @@ +/* + * Lemote Fuloong platform support + * + * Copyright(c) 2010 Arnaud Patard <apatard@mandriva.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/mc146818rtc.h> + +struct resource loongson_rtc_resources[] = { + { + .start = RTC_PORT(0), + .end = RTC_PORT(1), + .flags = IORESOURCE_IO, + }, { + .start = RTC_IRQ, + .end = RTC_IRQ, + .flags = IORESOURCE_IRQ, + } +}; + +static struct platform_device loongson_rtc_device = { + .name = "rtc_cmos", + .id = -1, + .resource = loongson_rtc_resources, + .num_resources = ARRAY_SIZE(loongson_rtc_resources), +}; + + +static int __init loongson_rtc_platform_init(void) +{ + platform_device_register(&loongson_rtc_device); + return 0; +} + +device_initcall(loongson_rtc_platform_init); diff --git a/arch/mips/math-emu/dp_simple.c b/arch/mips/math-emu/dp_simple.c index d9ae1db..b909742 100644 --- a/arch/mips/math-emu/dp_simple.c +++ b/arch/mips/math-emu/dp_simple.c @@ -78,6 +78,7 @@ ieee754dp ieee754dp_abs(ieee754dp x) DPSIGN(x) = 0; if (xc == IEEE754_CLASS_SNAN) { + SETCX(IEEE754_INVALID_OPERATION); return ieee754dp_nanxcpt(ieee754dp_indef(), "abs"); } diff --git a/arch/mips/math-emu/sp_simple.c b/arch/mips/math-emu/sp_simple.c index 3175477..2fd53c9 100644 --- a/arch/mips/math-emu/sp_simple.c +++ b/arch/mips/math-emu/sp_simple.c @@ -78,6 +78,7 @@ ieee754sp ieee754sp_abs(ieee754sp x) SPSIGN(x) = 0; if (xc == IEEE754_CLASS_SNAN) { + SETCX(IEEE754_INVALID_OPERATION); return ieee754sp_nanxcpt(ieee754sp_indef(), "abs"); } diff --git a/arch/mips/oprofile/op_model_loongson2.c b/arch/mips/oprofile/op_model_loongson2.c index d0d24e0..60d3ea6 100644 --- a/arch/mips/oprofile/op_model_loongson2.c +++ b/arch/mips/oprofile/op_model_loongson2.c @@ -43,6 +43,12 @@ static struct loongson2_register_config { static char *oprofid = "LoongsonPerf"; static irqreturn_t loongson2_perfcount_handler(int irq, void *dev_id); +static void reset_counters(void *arg) +{ + write_c0_perfctrl(0); + write_c0_perfcnt(0); +} + static void loongson2_reg_setup(struct op_counter_config *cfg) { unsigned int ctrl = 0; @@ -139,7 +145,7 @@ static int __init loongson2_init(void) static void loongson2_exit(void) { - write_c0_perfctrl(0); + reset_counters(NULL); free_irq(LOONGSON2_PERFCNT_IRQ, oprofid); } |
