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author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-05-09 10:34:00 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-05-09 10:34:00 -0700 |
commit | 3ed43c745d2ce0c4ca15ad406285d1cc7e8ceec3 (patch) | |
tree | 286decf836edc60ef70a0306a785ed497f7fed73 /arch | |
parent | 26c5e98e88a6126adef2ddce21899e5afe823a2b (diff) | |
parent | 45828b812ddb608ddf83eff11601f62b726d13ab (diff) | |
download | linux-3ed43c745d2ce0c4ca15ad406285d1cc7e8ceec3.tar.bz2 |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6: (21 commits)
Blackfin Serial Driver: abstract away DLAB differences into header
Blackfin Serial Driver: macro away the IER differences between processors
[Blackfin] arch: remove useless IRQ_SW_INT defines
[Blackfin] arch: protect linux/usb/musb.h include until the driver gets mainlined
[Blackfin] arch: protect linux/usb/isp1362.h include until the driver gets mainlined
[Blackfin] arch: add EBIU supporting for BF54x EZKIT SMSC LAN911x/LAN921x families embedded ethernet driver
[Blackfin] arch: Set spi flash partition on bf527 as like bf548.
[Blackfin] arch: fix bug - Remove module will not free L1 memory used
[Blackfin] arch: fix wrong header name in comment
[Blackfin] arch: Fix BUG - spi flash on bf527 ezkit would fail at mount
[Blackfin] arch: add twi_lcd and twi_keypad i2c board info to bf527-ezkit
[Blackfin] arch: Add physmap partition for BF527-EZkit
[Blackfin] arch: fix gdb testing regression
[Blackfin] arch: disable single stepping when delivering a signal
[Blackfin] arch: Delete unused (copied from m68k) entries in asm-offsets.c.
[Blackfin] arch: In the double fault handler, set up the PT_RETI slot
[Blackfin] arch: Support for CPU_FREQ and NOHZ
[Blackfin] arch: Functional power management support: Add CPU and platform voltage scaling support
[Blackfin] arch: fix bug - breaking the atomic sections code.
[Blackfin] arch: Equalize include files: Add VR_CTL masks
...
Diffstat (limited to 'arch')
23 files changed, 682 insertions, 107 deletions
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig index 795d0ac67c21..fd5708523f2e 100644 --- a/arch/blackfin/Kconfig +++ b/arch/blackfin/Kconfig @@ -832,6 +832,7 @@ config BANK_0 config BANK_1 hex "Bank 1" default 0x7BB0 + default 0x5558 if BF54x config BANK_2 hex "Bank 2" @@ -963,21 +964,22 @@ endchoice endmenu -if (BF537 || BF533 || BF54x) - menu "CPU Frequency scaling" source "drivers/cpufreq/Kconfig" -config CPU_FREQ - bool +config CPU_VOLTAGE + bool "CPU Voltage scaling" + depends on EXPERIMENTAL + depends on CPU_FREQ default n help - If you want to enable this option, you should select the - DPMC driver from Character Devices. -endmenu + Say Y here if you want CPU voltage scaling according to the CPU frequency. + This option violates the PLL BYPASS recommendation in the Blackfin Processor + manuals. There is a theoretical risk that during VDDINT transitions + the PLL may unlock. -endif +endmenu source "net/Kconfig" diff --git a/arch/blackfin/kernel/asm-offsets.c b/arch/blackfin/kernel/asm-offsets.c index 721f15f3cebf..881afe9082c7 100644 --- a/arch/blackfin/kernel/asm-offsets.c +++ b/arch/blackfin/kernel/asm-offsets.c @@ -56,9 +56,6 @@ int main(void) /* offsets into the thread struct */ DEFINE(THREAD_KSP, offsetof(struct thread_struct, ksp)); DEFINE(THREAD_USP, offsetof(struct thread_struct, usp)); - DEFINE(THREAD_SR, offsetof(struct thread_struct, seqstat)); - DEFINE(PT_SR, offsetof(struct thread_struct, seqstat)); - DEFINE(THREAD_ESP0, offsetof(struct thread_struct, esp0)); DEFINE(THREAD_PC, offsetof(struct thread_struct, pc)); DEFINE(KERNEL_STACK_SIZE, THREAD_SIZE); diff --git a/arch/blackfin/kernel/fixed_code.S b/arch/blackfin/kernel/fixed_code.S index 5ed47228a390..4b03ba025488 100644 --- a/arch/blackfin/kernel/fixed_code.S +++ b/arch/blackfin/kernel/fixed_code.S @@ -1,6 +1,6 @@ /* * This file contains sequences of code that will be copied to a - * fixed location, defined in <asm/atomic_seq.h>. The interrupt + * fixed location, defined in <asm/fixed_code.h>. The interrupt * handlers ensure that these sequences appear to be atomic when * executed from userspace. * These are aligned to 16 bytes, so that we have some space to replace diff --git a/arch/blackfin/kernel/module.c b/arch/blackfin/kernel/module.c index 8b9fe29d03f4..14a42848f37f 100644 --- a/arch/blackfin/kernel/module.c +++ b/arch/blackfin/kernel/module.c @@ -160,6 +160,13 @@ int module_frob_arch_sections(Elf_Ehdr * hdr, Elf_Shdr * sechdrs, char *secstrings, struct module *mod) { + /* + * XXX: sechdrs are vmalloced in kernel/module.c + * and would be vfreed just after module is loaded, + * so we hack to keep the only information we needed + * in mod->arch to correctly free L1 I/D sram later. + * NOTE: this breaks the semantic of mod->arch structure. + */ Elf_Shdr *s, *sechdrs_end = sechdrs + hdr->e_shnum; void *dest = NULL; @@ -167,8 +174,8 @@ module_frob_arch_sections(Elf_Ehdr * hdr, Elf_Shdr * sechdrs, if ((strcmp(".l1.text", secstrings + s->sh_name) == 0) || ((strcmp(".text", secstrings + s->sh_name) == 0) && (hdr->e_flags & FLG_CODE_IN_L1) && (s->sh_size > 0))) { - mod->arch.text_l1 = s; dest = l1_inst_sram_alloc(s->sh_size); + mod->arch.text_l1 = dest; if (dest == NULL) { printk(KERN_ERR "module %s: L1 instruction memory allocation failed\n", @@ -182,8 +189,8 @@ module_frob_arch_sections(Elf_Ehdr * hdr, Elf_Shdr * sechdrs, if ((strcmp(".l1.data", secstrings + s->sh_name) == 0) || ((strcmp(".data", secstrings + s->sh_name) == 0) && (hdr->e_flags & FLG_DATA_IN_L1) && (s->sh_size > 0))) { - mod->arch.data_a_l1 = s; dest = l1_data_sram_alloc(s->sh_size); + mod->arch.data_a_l1 = dest; if (dest == NULL) { printk(KERN_ERR "module %s: L1 data memory allocation failed\n", @@ -197,8 +204,8 @@ module_frob_arch_sections(Elf_Ehdr * hdr, Elf_Shdr * sechdrs, if (strcmp(".l1.bss", secstrings + s->sh_name) == 0 || ((strcmp(".bss", secstrings + s->sh_name) == 0) && (hdr->e_flags & FLG_DATA_IN_L1) && (s->sh_size > 0))) { - mod->arch.bss_a_l1 = s; dest = l1_data_sram_alloc(s->sh_size); + mod->arch.bss_a_l1 = dest; if (dest == NULL) { printk(KERN_ERR "module %s: L1 data memory allocation failed\n", @@ -210,8 +217,8 @@ module_frob_arch_sections(Elf_Ehdr * hdr, Elf_Shdr * sechdrs, s->sh_addr = (unsigned long)dest; } if (strcmp(".l1.data.B", secstrings + s->sh_name) == 0) { - mod->arch.data_b_l1 = s; dest = l1_data_B_sram_alloc(s->sh_size); + mod->arch.data_b_l1 = dest; if (dest == NULL) { printk(KERN_ERR "module %s: L1 data memory allocation failed\n", @@ -223,8 +230,8 @@ module_frob_arch_sections(Elf_Ehdr * hdr, Elf_Shdr * sechdrs, s->sh_addr = (unsigned long)dest; } if (strcmp(".l1.bss.B", secstrings + s->sh_name) == 0) { - mod->arch.bss_b_l1 = s; dest = l1_data_B_sram_alloc(s->sh_size); + mod->arch.bss_b_l1 = dest; if (dest == NULL) { printk(KERN_ERR "module %s: L1 data memory allocation failed\n", @@ -416,14 +423,14 @@ module_finalize(const Elf_Ehdr * hdr, void module_arch_cleanup(struct module *mod) { - if ((mod->arch.text_l1) && (mod->arch.text_l1->sh_addr)) - l1_inst_sram_free((void *)mod->arch.text_l1->sh_addr); - if ((mod->arch.data_a_l1) && (mod->arch.data_a_l1->sh_addr)) - l1_data_sram_free((void *)mod->arch.data_a_l1->sh_addr); - if ((mod->arch.bss_a_l1) && (mod->arch.bss_a_l1->sh_addr)) - l1_data_sram_free((void *)mod->arch.bss_a_l1->sh_addr); - if ((mod->arch.data_b_l1) && (mod->arch.data_b_l1->sh_addr)) - l1_data_B_sram_free((void *)mod->arch.data_b_l1->sh_addr); - if ((mod->arch.bss_b_l1) && (mod->arch.bss_b_l1->sh_addr)) - l1_data_B_sram_free((void *)mod->arch.bss_b_l1->sh_addr); + if (mod->arch.text_l1) + l1_inst_sram_free((void *)mod->arch.text_l1); + if (mod->arch.data_a_l1) + l1_data_sram_free((void *)mod->arch.data_a_l1); + if (mod->arch.bss_a_l1) + l1_data_sram_free((void *)mod->arch.bss_a_l1); + if (mod->arch.data_b_l1) + l1_data_B_sram_free((void *)mod->arch.data_b_l1); + if (mod->arch.bss_b_l1) + l1_data_B_sram_free((void *)mod->arch.bss_b_l1); } diff --git a/arch/blackfin/kernel/process.c b/arch/blackfin/kernel/process.c index be9fdd00d7cb..53c2cd255441 100644 --- a/arch/blackfin/kernel/process.c +++ b/arch/blackfin/kernel/process.c @@ -245,7 +245,7 @@ unsigned long get_wchan(struct task_struct *p) void finish_atomic_sections (struct pt_regs *regs) { - int __user *up0 = (int __user *)®s->p0; + int __user *up0 = (int __user *)regs->p0; if (regs->pc < ATOMIC_SEQS_START || regs->pc >= ATOMIC_SEQS_END) return; diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c index b4f062c172c6..f51ab088098e 100644 --- a/arch/blackfin/kernel/ptrace.c +++ b/arch/blackfin/kernel/ptrace.c @@ -185,8 +185,8 @@ void ptrace_disable(struct task_struct *child) { unsigned long tmp; /* make sure the single step bit is not set. */ - tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16); - put_reg(child, PT_SR, tmp); + tmp = get_reg(child, PT_SYSCFG) & ~TRACE_BITS; + put_reg(child, PT_SYSCFG, tmp); } long arch_ptrace(struct task_struct *child, long request, long addr, long data) diff --git a/arch/blackfin/kernel/signal.c b/arch/blackfin/kernel/signal.c index cb9d883d493c..dbc3bbf846be 100644 --- a/arch/blackfin/kernel/signal.c +++ b/arch/blackfin/kernel/signal.c @@ -42,6 +42,9 @@ #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) +/* Location of the trace bit in SYSCFG. */ +#define TRACE_BITS 0x0001 + struct fdpic_func_descriptor { unsigned long text; unsigned long GOT; @@ -225,6 +228,16 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t * info, regs->r1 = (unsigned long)(&frame->info); regs->r2 = (unsigned long)(&frame->uc); + /* + * Clear the trace flag when entering the signal handler, but + * notify any tracer that was single-stepping it. The tracer + * may want to single-step inside the handler too. + */ + if (regs->syscfg & TRACE_BITS) { + regs->syscfg &= ~TRACE_BITS; + ptrace_notify(SIGTRAP); + } + return 0; give_sigsegv: diff --git a/arch/blackfin/kernel/time-ts.c b/arch/blackfin/kernel/time-ts.c index 4482c47c09e5..e887efc86c29 100644 --- a/arch/blackfin/kernel/time-ts.c +++ b/arch/blackfin/kernel/time-ts.c @@ -60,7 +60,7 @@ static inline unsigned long long cycles_2_ns(cycle_t cyc) static cycle_t read_cycles(void) { - return get_cycles(); + return __bfin_cycles_off + (get_cycles() << __bfin_cycles_mod); } unsigned long long sched_clock(void) @@ -117,7 +117,7 @@ static void bfin_timer_set_mode(enum clock_event_mode mode, break; } case CLOCK_EVT_MODE_ONESHOT: - bfin_write_TSCALE(0); + bfin_write_TSCALE(TIME_SCALE - 1); bfin_write_TCOUNT(0); bfin_write_TCNTL(TMPWR | TMREN); CSYNC(); @@ -183,10 +183,14 @@ irqreturn_t timer_interrupt(int irq, void *dev_id) static int __init bfin_clockevent_init(void) { + unsigned long timer_clk; + + timer_clk = get_cclk() / TIME_SCALE; + setup_irq(IRQ_CORETMR, &bfin_timer_irq); bfin_timer_init(); - clockevent_bfin.mult = div_sc(get_cclk(), NSEC_PER_SEC, clockevent_bfin.shift); + clockevent_bfin.mult = div_sc(timer_clk, NSEC_PER_SEC, clockevent_bfin.shift); clockevent_bfin.max_delta_ns = clockevent_delta2ns(-1, &clockevent_bfin); clockevent_bfin.min_delta_ns = clockevent_delta2ns(100, &clockevent_bfin); clockevents_register_device(&clockevent_bfin); diff --git a/arch/blackfin/mach-bf527/boards/ezkit.c b/arch/blackfin/mach-bf527/boards/ezkit.c index 583d53811f03..8aa49f804228 100644 --- a/arch/blackfin/mach-bf527/boards/ezkit.c +++ b/arch/blackfin/mach-bf527/boards/ezkit.c @@ -32,12 +32,14 @@ #include <linux/platform_device.h> #include <linux/mtd/mtd.h> #include <linux/mtd/partitions.h> +#include <linux/mtd/physmap.h> #include <linux/spi/spi.h> #include <linux/spi/flash.h> #if defined(CONFIG_USB_ISP1362_HCD) || defined(CONFIG_USB_ISP1362_HCD_MODULE) #include <linux/usb/isp1362.h> #endif #include <linux/ata_platform.h> +#include <linux/i2c.h> #include <linux/irq.h> #include <linux/interrupt.h> #include <linux/usb/sl811.h> @@ -50,6 +52,7 @@ #include <asm/reboot.h> #include <asm/nand.h> #include <asm/portmux.h> +#include <asm/dpmc.h> #include <linux/spi/ad7877.h> /* @@ -171,6 +174,46 @@ static struct platform_device bf52x_t350mcqb_device = { }; #endif +#if defined(CONFIG_MTD_PHYSMAP) || defined(CONFIG_MTD_PHYSMAP_MODULE) +static struct mtd_partition ezkit_partitions[] = { + { + .name = "Bootloader", + .size = 0x40000, + .offset = 0, + }, { + .name = "Kernel", + .size = 0x1C0000, + .offset = MTDPART_OFS_APPEND, + }, { + .name = "RootFS", + .size = MTDPART_SIZ_FULL, + .offset = MTDPART_OFS_APPEND, + } +}; + +static struct physmap_flash_data ezkit_flash_data = { + .width = 2, + .parts = ezkit_partitions, + .nr_parts = ARRAY_SIZE(ezkit_partitions), +}; + +static struct resource ezkit_flash_resource = { + .start = 0x20000000, + .end = 0x203fffff, + .flags = IORESOURCE_MEM, +}; + +static struct platform_device ezkit_flash_device = { + .name = "physmap-flash", + .id = 0, + .dev = { + .platform_data = &ezkit_flash_data, + }, + .num_resources = 1, + .resource = &ezkit_flash_resource, +}; +#endif + #if defined(CONFIG_MTD_NAND_BF5XX) || defined(CONFIG_MTD_NAND_BF5XX_MODULE) static struct mtd_partition partition_info[] = { { @@ -420,11 +463,7 @@ static struct mtd_partition bfin_spi_flash_partitions[] = { .offset = 0, .mask_flags = MTD_CAP_ROM }, { - .name = "kernel", - .size = 0xe0000, - .offset = MTDPART_OFS_APPEND, - }, { - .name = "file system", + .name = "linux kernel", .size = MTDPART_SIZ_FULL, .offset = MTDPART_OFS_APPEND, } @@ -434,7 +473,7 @@ static struct flash_platform_data bfin_spi_flash_data = { .name = "m25p80", .parts = bfin_spi_flash_partitions, .nr_parts = ARRAY_SIZE(bfin_spi_flash_partitions), - .type = "m25p64", + .type = "m25p16", }; /* SPI flash chip (m25p64) */ @@ -755,6 +794,24 @@ static struct platform_device i2c_bfin_twi_device = { }; #endif +#ifdef CONFIG_I2C_BOARDINFO +static struct i2c_board_info __initdata bfin_i2c_board_info[] = { +#if defined(CONFIG_TWI_LCD) || defined(CONFIG_TWI_LCD_MODULE) + { + I2C_BOARD_INFO("pcf8574_lcd", 0x22), + .type = "pcf8574_lcd", + }, +#endif +#if defined(CONFIG_TWI_KEYPAD) || defined(CONFIG_TWI_KEYPAD_MODULE) + { + I2C_BOARD_INFO("pcf8574_keypad", 0x27), + .type = "pcf8574_keypad", + .irq = IRQ_PF8, + }, +#endif +}; +#endif + #if defined(CONFIG_SERIAL_BFIN_SPORT) || defined(CONFIG_SERIAL_BFIN_SPORT_MODULE) static struct platform_device bfin_sport0_uart_device = { .name = "bfin-sport-uart", @@ -839,7 +896,32 @@ static struct platform_device bfin_gpios_device = { .resource = &bfin_gpios_resources, }; +static const unsigned int cclk_vlev_datasheet[] = +{ + VRPAIR(VLEV_100, 400000000), + VRPAIR(VLEV_105, 426000000), + VRPAIR(VLEV_110, 500000000), + VRPAIR(VLEV_115, 533000000), + VRPAIR(VLEV_120, 600000000), +}; + +static struct bfin_dpmc_platform_data bfin_dmpc_vreg_data = { + .tuple_tab = cclk_vlev_datasheet, + .tabsize = ARRAY_SIZE(cclk_vlev_datasheet), + .vr_settling_time = 25 /* us */, +}; + +static struct platform_device bfin_dpmc = { + .name = "bfin dpmc", + .dev = { + .platform_data = &bfin_dmpc_vreg_data, + }, +}; + static struct platform_device *stamp_devices[] __initdata = { + + &bfin_dpmc, + #if defined(CONFIG_MTD_NAND_BF5XX) || defined(CONFIG_MTD_NAND_BF5XX_MODULE) &bf5xx_nand_device, #endif @@ -921,12 +1003,22 @@ static struct platform_device *stamp_devices[] __initdata = { &bfin_device_gpiokeys, #endif +#if defined(CONFIG_MTD_PHYSMAP) || defined(CONFIG_MTD_PHYSMAP_MODULE) + &ezkit_flash_device, +#endif + &bfin_gpios_device, }; static int __init stamp_init(void) { printk(KERN_INFO "%s(): registering device resources\n", __func__); + +#ifdef CONFIG_I2C_BOARDINFO + i2c_register_board_info(0, bfin_i2c_board_info, + ARRAY_SIZE(bfin_i2c_board_info)); +#endif + platform_add_devices(stamp_devices, ARRAY_SIZE(stamp_devices)); #if defined(CONFIG_SPI_BFIN) || defined(CONFIG_SPI_BFIN_MODULE) spi_register_board_info(bfin_spi_board_info, diff --git a/arch/blackfin/mach-bf533/boards/cm_bf533.c b/arch/blackfin/mach-bf533/boards/cm_bf533.c index a03149c72681..ed2b0b8f5dc9 100644 --- a/arch/blackfin/mach-bf533/boards/cm_bf533.c +++ b/arch/blackfin/mach-bf533/boards/cm_bf533.c @@ -33,12 +33,15 @@ #include <linux/mtd/partitions.h> #include <linux/spi/spi.h> #include <linux/spi/flash.h> +#if defined(CONFIG_USB_ISP1362_HCD) || defined(CONFIG_USB_ISP1362_HCD_MODULE) #include <linux/usb/isp1362.h> +#endif #include <linux/ata_platform.h> #include <linux/irq.h> #include <asm/dma.h> #include <asm/bfin5xx_spi.h> #include <asm/portmux.h> +#include <asm/dpmc.h> /* * Name the Board for the /proc/cpuinfo @@ -341,7 +344,37 @@ static struct platform_device bfin_pata_device = { }; #endif +static const unsigned int cclk_vlev_datasheet[] = +{ + VRPAIR(VLEV_085, 250000000), + VRPAIR(VLEV_090, 376000000), + VRPAIR(VLEV_095, 426000000), + VRPAIR(VLEV_100, 426000000), + VRPAIR(VLEV_105, 476000000), + VRPAIR(VLEV_110, 476000000), + VRPAIR(VLEV_115, 476000000), + VRPAIR(VLEV_120, 600000000), + VRPAIR(VLEV_125, 600000000), + VRPAIR(VLEV_130, 600000000), +}; + +static struct bfin_dpmc_platform_data bfin_dmpc_vreg_data = { + .tuple_tab = cclk_vlev_datasheet, + .tabsize = ARRAY_SIZE(cclk_vlev_datasheet), + .vr_settling_time = 25 /* us */, +}; + +static struct platform_device bfin_dpmc = { + .name = "bfin dpmc", + .dev = { + .platform_data = &bfin_dmpc_vreg_data, + }, +}; + static struct platform_device *cm_bf533_devices[] __initdata = { + + &bfin_dpmc, + #if defined(CONFIG_SERIAL_BFIN) || defined(CONFIG_SERIAL_BFIN_MODULE) &bfin_uart_device, #endif diff --git a/arch/blackfin/mach-bf533/boards/ezkit.c b/arch/blackfin/mach-bf533/boards/ezkit.c index 08a7943949ae..9d28415163ea 100644 --- a/arch/blackfin/mach-bf533/boards/ezkit.c +++ b/arch/blackfin/mach-bf533/boards/ezkit.c @@ -42,6 +42,7 @@ #include <asm/dma.h> #include <asm/bfin5xx_spi.h> #include <asm/portmux.h> +#include <asm/dpmc.h> /* * Name the Board for the /proc/cpuinfo @@ -350,7 +351,37 @@ static struct platform_device i2c_gpio_device = { }; #endif +static const unsigned int cclk_vlev_datasheet[] = +{ + VRPAIR(VLEV_085, 250000000), + VRPAIR(VLEV_090, 376000000), + VRPAIR(VLEV_095, 426000000), + VRPAIR(VLEV_100, 426000000), + VRPAIR(VLEV_105, 476000000), + VRPAIR(VLEV_110, 476000000), + VRPAIR(VLEV_115, 476000000), + VRPAIR(VLEV_120, 600000000), + VRPAIR(VLEV_125, 600000000), + VRPAIR(VLEV_130, 600000000), +}; + +static struct bfin_dpmc_platform_data bfin_dmpc_vreg_data = { + .tuple_tab = cclk_vlev_datasheet, + .tabsize = ARRAY_SIZE(cclk_vlev_datasheet), + .vr_settling_time = 25 /* us */, +}; + +static struct platform_device bfin_dpmc = { + .name = "bfin dpmc", + .dev = { + .platform_data = &bfin_dmpc_vreg_data, + }, +}; + static struct platform_device *ezkit_devices[] __initdata = { + + &bfin_dpmc, + #if defined(CONFIG_SMC91X) || defined(CONFIG_SMC91X_MODULE) &smc91x_device, #endif diff --git a/arch/blackfin/mach-bf533/boards/stamp.c b/arch/blackfin/mach-bf533/boards/stamp.c index 024f418ae543..7fd35fb32fd5 100644 --- a/arch/blackfin/mach-bf533/boards/stamp.c +++ b/arch/blackfin/mach-bf533/boards/stamp.c @@ -45,6 +45,7 @@ #include <asm/bfin5xx_spi.h> #include <asm/reboot.h> #include <asm/portmux.h> +#include <asm/dpmc.h> /* * Name the Board for the /proc/cpuinfo @@ -516,7 +517,37 @@ static struct i2c_board_info __initdata bfin_i2c_board_info[] = { }; #endif +static const unsigned int cclk_vlev_datasheet[] = +{ + VRPAIR(VLEV_085, 250000000), + VRPAIR(VLEV_090, 376000000), + VRPAIR(VLEV_095, 426000000), + VRPAIR(VLEV_100, 426000000), + VRPAIR(VLEV_105, 476000000), + VRPAIR(VLEV_110, 476000000), + VRPAIR(VLEV_115, 476000000), + VRPAIR(VLEV_120, 600000000), + VRPAIR(VLEV_125, 600000000), + VRPAIR(VLEV_130, 600000000), +}; + +static struct bfin_dpmc_platform_data bfin_dmpc_vreg_data = { + .tuple_tab = cclk_vlev_datasheet, + .tabsize = ARRAY_SIZE(cclk_vlev_datasheet), + .vr_settling_time = 25 /* us */, +}; + +static struct platform_device bfin_dpmc = { + .name = "bfin dpmc", + .dev = { + .platform_data = &bfin_dmpc_vreg_data, + }, +}; + static struct platform_device *stamp_devices[] __initdata = { + + &bfin_dpmc, + #if defined(CONFIG_RTC_DRV_BFIN) || defined(CONFIG_RTC_DRV_BFIN_MODULE) &rtc_device, #endif diff --git a/arch/blackfin/mach-bf537/boards/cm_bf537.c b/arch/blackfin/mach-bf537/boards/cm_bf537.c index d8a23cd9b9ed..73f2142875e2 100644 --- a/arch/blackfin/mach-bf537/boards/cm_bf537.c +++ b/arch/blackfin/mach-bf537/boards/cm_bf537.c @@ -35,12 +35,15 @@ #include <linux/mtd/partitions.h> #include <linux/spi/spi.h> #include <linux/spi/flash.h> +#if defined(CONFIG_USB_ISP1362_HCD) || defined(CONFIG_USB_ISP1362_HCD_MODULE) #include <linux/usb/isp1362.h> +#endif #include <linux/ata_platform.h> #include <linux/irq.h> #include <asm/dma.h> #include <asm/bfin5xx_spi.h> #include <asm/portmux.h> +#include <asm/dpmc.h> /* * Name the Board for the /proc/cpuinfo @@ -428,7 +431,37 @@ static struct platform_device bfin_pata_device = { }; #endif +static const unsigned int cclk_vlev_datasheet[] = +{ + VRPAIR(VLEV_085, 250000000), + VRPAIR(VLEV_090, 376000000), + VRPAIR(VLEV_095, 426000000), + VRPAIR(VLEV_100, 426000000), + VRPAIR(VLEV_105, 476000000), + VRPAIR(VLEV_110, 476000000), + VRPAIR(VLEV_115, 476000000), + VRPAIR(VLEV_120, 500000000), + VRPAIR(VLEV_125, 533000000), + VRPAIR(VLEV_130, 600000000), +}; + +static struct bfin_dpmc_platform_data bfin_dmpc_vreg_data = { + .tuple_tab = cclk_vlev_datasheet, + .tabsize = ARRAY_SIZE(cclk_vlev_datasheet), + .vr_settling_time = 25 /* us */, +}; + +static struct platform_device bfin_dpmc = { + .name = "bfin dpmc", + .dev = { + .platform_data = &bfin_dmpc_vreg_data, + }, +}; + static struct platform_device *cm_bf537_devices[] __initdata = { + + &bfin_dpmc, + #if defined(CONFIG_FB_HITACHI_TX09) || defined(CONFIG_FB_HITACHI_TX09_MODULE) &hitachi_fb_device, #endif diff --git a/arch/blackfin/mach-bf537/boards/stamp.c b/arch/blackfin/mach-bf537/boards/stamp.c index d3727b7c2d7d..9a756d1f3d73 100644 --- a/arch/blackfin/mach-bf537/boards/stamp.c +++ b/arch/blackfin/mach-bf537/boards/stamp.c @@ -47,6 +47,7 @@ #include <asm/bfin5xx_spi.h> #include <asm/reboot.h> #include <asm/portmux.h> +#include <asm/dpmc.h> #include <linux/spi/ad7877.h> /* @@ -817,7 +818,37 @@ static struct platform_device bfin_pata_device = { }; #endif +static const unsigned int cclk_vlev_datasheet[] = +{ + VRPAIR(VLEV_085, 250000000), + VRPAIR(VLEV_090, 376000000), + VRPAIR(VLEV_095, 426000000), + VRPAIR(VLEV_100, 426000000), + VRPAIR(VLEV_105, 476000000), + VRPAIR(VLEV_110, 476000000), + VRPAIR(VLEV_115, 476000000), + VRPAIR(VLEV_120, 500000000), + VRPAIR(VLEV_125, 533000000), + VRPAIR(VLEV_130, 600000000), +}; + +static struct bfin_dpmc_platform_data bfin_dmpc_vreg_data = { + .tuple_tab = cclk_vlev_datasheet, + .tabsize = ARRAY_SIZE(cclk_vlev_datasheet), + .vr_settling_time = 25 /* us */, +}; + +static struct platform_device bfin_dpmc = { + .name = "bfin dpmc", + .dev = { + .platform_data = &bfin_dmpc_vreg_data, + }, +}; + static struct platform_device *stamp_devices[] __initdata = { + + &bfin_dpmc, + #if defined(CONFIG_BFIN_CFPCMCIA) || defined(CONFIG_BFIN_CFPCMCIA_MODULE) &bfin_pcmcia_cf_device, #endif diff --git a/arch/blackfin/mach-bf548/boards/cm_bf548.c b/arch/blackfin/mach-bf548/boards/cm_bf548.c index e3e8479fffb5..3b74f96d3590 100644 --- a/arch/blackfin/mach-bf548/boards/cm_bf548.c +++ b/arch/blackfin/mach-bf548/boards/cm_bf548.c @@ -36,7 +36,9 @@ #include <linux/spi/flash.h> #include <linux/irq.h> #include <linux/interrupt.h> +#if defined(CONFIG_USB_MUSB_HDRC) || defined(CONFIG_USB_MUSB_HDRC_MODULE) #include <linux/usb/musb.h> +#endif #include <asm/bfin5xx_spi.h> #include <asm/cplb.h> #include <asm/dma.h> @@ -44,6 +46,7 @@ #include <asm/nand.h> #include <asm/portmux.h> #include <asm/mach/bf54x_keys.h> +#include <asm/dpmc.h> #include <linux/input.h> #include <linux/spi/ad7877.h> @@ -590,7 +593,38 @@ static struct platform_device bfin_device_gpiokeys = { }; #endif +static const unsigned int cclk_vlev_datasheet[] = +{ +/* + * Internal VLEV BF54XSBBC1533 + ****temporarily using these values until data sheet is updated + */ + VRPAIR(VLEV_085, 150000000), + VRPAIR(VLEV_090, 250000000), + VRPAIR(VLEV_110, 276000000), + VRPAIR(VLEV_115, 301000000), + VRPAIR(VLEV_120, 525000000), + VRPAIR(VLEV_125, 550000000), + VRPAIR(VLEV_130, 600000000), +}; + +static struct bfin_dpmc_platform_data bfin_dmpc_vreg_data = { + .tuple_tab = cclk_vlev_datasheet, + .tabsize = ARRAY_SIZE(cclk_vlev_datasheet), + .vr_settling_time = 25 /* us */, +}; + +static struct platform_device bfin_dpmc = { + .name = "bfin dpmc", + .dev = { + .platform_data = &bfin_dmpc_vreg_data, + }, +}; + static struct platform_device *cm_bf548_devices[] __initdata = { + + &bfin_dpmc, + #if defined(CONFIG_RTC_DRV_BFIN) || defined(CONFIG_RTC_DRV_BFIN_MODULE) &rtc_device, #endif diff --git a/arch/blackfin/mach-bf548/boards/ezkit.c b/arch/blackfin/mach-bf548/boards/ezkit.c index b00f68ac6bc9..d1682bb37509 100644 --- a/arch/blackfin/mach-bf548/boards/ezkit.c +++ b/arch/blackfin/mach-bf548/boards/ezkit.c @@ -46,6 +46,7 @@ #include <asm/dma.h> #include <asm/gpio.h> #include <asm/nand.h> +#include <asm/dpmc.h> #include <asm/portmux.h> #include <asm/mach/bf54x_keys.h> #include <linux/input.h> @@ -689,7 +690,38 @@ static struct platform_device bfin_gpios_device = { .resource = &bfin_gpios_resources, }; +static const unsigned int cclk_vlev_datasheet[] = +{ +/* + * Internal VLEV BF54XSBBC1533 + ****temporarily using these values until data sheet is updated + */ + VRPAIR(VLEV_085, 150000000), + VRPAIR(VLEV_090, 250000000), + VRPAIR(VLEV_110, 276000000), + VRPAIR(VLEV_115, 301000000), + VRPAIR(VLEV_120, 525000000), + VRPAIR(VLEV_125, 550000000), + VRPAIR(VLEV_130, 600000000), +}; + +static struct bfin_dpmc_platform_data bfin_dmpc_vreg_data = { + .tuple_tab = cclk_vlev_datasheet, + .tabsize = ARRAY_SIZE(cclk_vlev_datasheet), + .vr_settling_time = 25 /* us */, +}; + +static struct platform_device bfin_dpmc = { + .name = "bfin dpmc", + .dev = { + .platform_data = &bfin_dmpc_vreg_data, + }, +}; + static struct platform_device *ezkit_devices[] __initdata = { + + &bfin_dpmc, + #if defined(CONFIG_RTC_DRV_BFIN) || defined(CONFIG_RTC_DRV_BFIN_MODULE) &rtc_device, #endif diff --git a/arch/blackfin/mach-bf561/boards/cm_bf561.c b/arch/blackfin/mach-bf561/boards/cm_bf561.c index 9fd580952fd8..466ef5929a25 100644 --- a/arch/blackfin/mach-bf561/boards/cm_bf561.c +++ b/arch/blackfin/mach-bf561/boards/cm_bf561.c @@ -33,12 +33,15 @@ #include <linux/mtd/partitions.h> #include <linux/spi/spi.h> #include <linux/spi/flash.h> +#if defined(CONFIG_USB_ISP1362_HCD) || defined(CONFIG_USB_ISP1362_HCD_MODULE) #include <linux/usb/isp1362.h> +#endif #include <linux/ata_platform.h> #include <linux/irq.h> #include <asm/dma.h> #include <asm/bfin5xx_spi.h> #include <asm/portmux.h> +#include <asm/dpmc.h> /* * Name the Board for the /proc/cpuinfo @@ -339,8 +342,37 @@ static struct platform_device bfin_pata_device = { }; #endif +static const unsigned int cclk_vlev_datasheet[] = +{ + VRPAIR(VLEV_085, 250000000), + VRPAIR(VLEV_090, 300000000), + VRPAIR(VLEV_095, 313000000), + VRPAIR(VLEV_100, 350000000), + VRPAIR(VLEV_105, 400000000), + VRPAIR(VLEV_110, 444000000), + VRPAIR(VLEV_115, 450000000), + VRPAIR(VLEV_120, 475000000), + VRPAIR(VLEV_125, 500000000), + VRPAIR(VLEV_130, 600000000), +}; + +static struct bfin_dpmc_platform_data bfin_dmpc_vreg_data = { + .tuple_tab = cclk_vlev_datasheet, + .tabsize = ARRAY_SIZE(cclk_vlev_datasheet), + .vr_settling_time = 25 /* us */, +}; + +static struct platform_device bfin_dpmc = { + .name = "bfin dpmc", + .dev = { + .platform_data = &bfin_dmpc_vreg_data, + }, +}; + static struct platform_device *cm_bf561_devices[] __initdata = { + &bfin_dpmc, + #if defined(CONFIG_FB_HITACHI_TX09) || defined(CONFIG_FB_HITACHI_TX09_MODULE) &hitachi_fb_device, #endif diff --git a/arch/blackfin/mach-bf561/boards/ezkit.c b/arch/blackfin/mach-bf561/boards/ezkit.c index 0d74b7d99209..61d8f7648b24 100644 --- a/arch/blackfin/mach-bf561/boards/ezkit.c +++ b/arch/blackfin/mach-bf561/boards/ezkit.c @@ -39,6 +39,7 @@ #include <asm/dma.h> #include <asm/bfin5xx_spi.h> #include <asm/portmux.h> +#include <asm/dpmc.h> /* * Name the Board for the /proc/cpuinfo @@ -443,7 +444,37 @@ static struct platform_device i2c_gpio_device = { }; #endif +static const unsigned int cclk_vlev_datasheet[] = +{ + VRPAIR(VLEV_085, 250000000), + VRPAIR(VLEV_090, 300000000), + VRPAIR(VLEV_095, 313000000), + VRPAIR(VLEV_100, 350000000), + VRPAIR(VLEV_105, 400000000), + VRPAIR(VLEV_110, 444000000), + VRPAIR(VLEV_115, 450000000), + VRPAIR(VLEV_120, 475000000), + VRPAIR(VLEV_125, 500000000), + VRPAIR(VLEV_130, 600000000), +}; + +static struct bfin_dpmc_platform_data bfin_dmpc_vreg_data = { + .tuple_tab = cclk_vlev_datasheet, + .tabsize = ARRAY_SIZE(cclk_vlev_datasheet), + .vr_settling_time = 25 /* us */, +}; + +static struct platform_device bfin_dpmc = { + .name = "bfin dpmc", + .dev = { + .platform_data = &bfin_dmpc_vreg_data, + }, +}; + static struct platform_device *ezkit_devices[] __initdata = { + + &bfin_dpmc, + #if defined(CONFIG_SMC91X) || defined(CONFIG_SMC91X_MODULE) &smc91x_device, #endif diff --git a/arch/blackfin/mach-common/Makefile b/arch/blackfin/mach-common/Makefile index 393081e9b680..422bfee34adc 100644 --- a/arch/blackfin/mach-common/Makefile +++ b/arch/blackfin/mach-common/Makefile @@ -6,5 +6,6 @@ obj-y := \ cache.o cacheinit.o entry.o \ interrupt.o lock.o irqpanic.o arch_checks.o ints-priority.o -obj-$(CONFIG_PM) += pm.o dpmc.o -obj-$(CONFIG_CPU_FREQ) += cpufreq.o +obj-$(CONFIG_PM) += pm.o dpmc_modes.o +obj-$(CONFIG_CPU_FREQ) += cpufreq.o +obj-$(CONFIG_CPU_VOLTAGE) += dpmc.o diff --git a/arch/blackfin/mach-common/cpufreq.c b/arch/blackfin/mach-common/cpufreq.c index ed81e00d20e1..75cdad291e88 100644 --- a/arch/blackfin/mach-common/cpufreq.c +++ b/arch/blackfin/mach-common/cpufreq.c @@ -62,6 +62,14 @@ static struct bfin_dpm_state { unsigned int tscale; /* change the divider on the core timer interrupt */ } dpm_state_table[3]; +/* + normalized to maximum frequncy offset for CYCLES, + used in time-ts cycles clock source, but could be used + somewhere also. + */ +unsigned long long __bfin_cycles_off; +unsigned int __bfin_cycles_mod; + /**************************************************************************/ static unsigned int bfin_getfreq(unsigned int cpu) @@ -80,6 +88,7 @@ static int bfin_target(struct cpufreq_policy *policy, unsigned int index, plldiv, tscale; unsigned long flags, cclk_hz; struct cpufreq_freqs freqs; + cycles_t cycles; if (cpufreq_frequency_table_target(policy, bfin_freq_table, target_freq, relation, &index)) @@ -101,8 +110,14 @@ static int bfin_target(struct cpufreq_policy *policy, bfin_write_PLL_DIV(plldiv); /* we have to adjust the core timer, because it is using cclk */ bfin_write_TSCALE(tscale); + cycles = get_cycles(); SSYNC(); + cycles += 10; /* ~10 cycles we loose after get_cycles() */ + __bfin_cycles_off += (cycles << __bfin_cycles_mod) - (cycles << index); + __bfin_cycles_mod = index; local_irq_restore(flags); + /* TODO: just test case for cycles clock source, remove later */ + pr_debug("cpufreq: done\n"); cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); return 0; @@ -119,22 +134,13 @@ static int __init __bfin_cpu_init(struct cpufreq_policy *policy) unsigned long cclk, sclk, csel, min_cclk; int index; -#ifdef CONFIG_CYCLES_CLOCKSOURCE -/* - * Clocksource CYCLES is still CONTINUOUS but not longer MONOTONIC in case we enable - * CPU frequency scaling, since CYCLES runs off Core Clock. - */ - printk(KERN_WARNING "CPU frequency scaling not supported: Clocksource not suitable\n" - return -ENODEV; -#endif - if (policy->cpu != 0) return -EINVAL; cclk = get_cclk(); sclk = get_sclk(); -#if ANOMALY_05000273 +#if ANOMALY_05000273 || (!defined(CONFIG_BF54x) && defined(CONFIG_BFIN_DCACHE)) min_cclk = sclk * 2; #else min_cclk = sclk; diff --git a/arch/blackfin/mach-common/dpmc.c b/arch/blackfin/mach-common/dpmc.c new file mode 100644 index 000000000000..02c7efd1bcf4 --- /dev/null +++ b/arch/blackfin/mach-common/dpmc.c @@ -0,0 +1,137 @@ +/* + * Copyright 2008 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#include <linux/cdev.h> +#include <linux/device.h> +#include <linux/errno.h> +#include <linux/fs.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/types.h> +#include <linux/cpufreq.h> + +#include <asm/delay.h> +#include <asm/dpmc.h> + +#define DRIVER_NAME "bfin dpmc" + +#define dprintk(msg...) \ + cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, DRIVER_NAME, msg) + +struct bfin_dpmc_platform_data *pdata; + +/** + * bfin_set_vlev - Update VLEV field in VR_CTL Reg. + * Avoid BYPASS sequence + */ +static void bfin_set_vlev(unsigned int vlev) +{ + unsigned pll_lcnt; + + pll_lcnt = bfin_read_PLL_LOCKCNT(); + + bfin_write_PLL_LOCKCNT(1); + bfin_write_VR_CTL((bfin_read_VR_CTL() & ~VLEV) | vlev); + bfin_write_PLL_LOCKCNT(pll_lcnt); +} + +/** + * bfin_get_vlev - Get CPU specific VLEV from platform device data + */ +static unsigned int bfin_get_vlev(unsigned int freq) +{ + int i; + + if (!pdata) + goto err_out; + + freq >>= 16; + + for (i = 0; i < pdata->tabsize; i++) + if (freq <= (pdata->tuple_tab[i] & 0xFFFF)) + return pdata->tuple_tab[i] >> 16; + +err_out: + printk(KERN_WARNING "DPMC: No suitable CCLK VDDINT voltage pair found\n"); + return VLEV_120; +} + +#ifdef CONFIG_CPU_FREQ +static int +vreg_cpufreq_notifier(struct notifier_block *nb, unsigned long val, void *data) +{ + struct cpufreq_freqs *freq = data; + + if (val == CPUFREQ_PRECHANGE && freq->old < freq->new) { + bfin_set_vlev(bfin_get_vlev(freq->new)); + udelay(pdata->vr_settling_time); /* Wait until Volatge settled */ + + } else if (val == CPUFREQ_POSTCHANGE && freq->old > freq->new) + bfin_set_vlev(bfin_get_vlev(freq->new)); + + return 0; +} + +static struct notifier_block vreg_cpufreq_notifier_block = { + .notifier_call = vreg_cpufreq_notifier +}; +#endif /* CONFIG_CPU_FREQ */ + +/** + * bfin_dpmc_probe - + * + */ +static int __devinit bfin_dpmc_probe(struct platform_device *pdev) +{ + if (pdev->dev.platform_data) + pdata = pdev->dev.platform_data; + else + return -EINVAL; + + return cpufreq_register_notifier(&vreg_cpufreq_notifier_block, + CPUFREQ_TRANSITION_NOTIFIER); +} + +/** + * bfin_dpmc_remove - + */ +static int __devexit bfin_dpmc_remove(struct platform_device *pdev) +{ + pdata = NULL; + return cpufreq_unregister_notifier(&vreg_cpufreq_notifier_block, + CPUFREQ_TRANSITION_NOTIFIER); +} + +struct platform_driver bfin_dpmc_device_driver = { + .probe = bfin_dpmc_probe, + .remove = __devexit_p(bfin_dpmc_remove), + .driver = { + .name = DRIVER_NAME, + } +}; + +/** + * bfin_dpmc_init - Init driver + */ +static int __init bfin_dpmc_init(void) +{ + return platform_driver_register(&bfin_dpmc_device_driver); +} +module_init(bfin_dpmc_init); + +/** + * bfin_dpmc_exit - break down driver + */ +static void __exit bfin_dpmc_exit(void) +{ + platform_driver_unregister(&bfin_dpmc_device_driver); +} +module_exit(bfin_dpmc_exit); + +MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); +MODULE_DESCRIPTION("cpu power management driver for Blackfin"); +MODULE_LICENSE("GPL"); diff --git a/arch/blackfin/mach-common/dpmc.S b/arch/blackfin/mach-common/dpmc_modes.S index 9d45aa3265b1..b7981d31c392 100644 --- a/arch/blackfin/mach-common/dpmc.S +++ b/arch/blackfin/mach-common/dpmc_modes.S @@ -1,30 +1,7 @@ /* - * File: arch/blackfin/mach-common/dpmc.S - * Based on: - * Author: LG Soft India + * Copyright 2004-2008 Analog Devices Inc. * - * Created: ? - * Description: Watchdog Timer APIs - * - * Modified: - * Copyright 2004-2006 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.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. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * Licensed under the GPL-2 or later. */ #include <linux/linkage.h> diff --git a/arch/blackfin/mach-common/entry.S b/arch/blackfin/mach-common/entry.S index f2fb87e9a46e..038f70e0be65 100644 --- a/arch/blackfin/mach-common/entry.S +++ b/arch/blackfin/mach-common/entry.S @@ -151,26 +151,62 @@ ENTRY(_ex_soft_bp) ENDPROC(_ex_soft_bp) ENTRY(_ex_single_step) + /* If we just returned from an interrupt, the single step event is + for the RTI instruction. */ r7 = retx; r6 = reti; cc = r7 == r6; - if cc jump _bfin_return_from_exception - r7 = syscfg; - bitclr (r7, 0); - syscfg = R7; + if cc jump _bfin_return_from_exception; + /* If we were in user mode, do the single step normally. */ p5.l = lo(IPEND); p5.h = hi(IPEND); r6 = [p5]; - cc = bittst(r6, 5); - if !cc jump _ex_trap_c; - p4.l = lo(EVT5); - p4.h = hi(EVT5); - r6.h = _exception_to_level5; - r6.l = _exception_to_level5; - r7 = [p4]; - cc = r6 == r7; - if !cc jump _ex_trap_c; + r7 = 0xffe0 (z); + r7 = r7 & r6; + cc = r7 == 0; + if !cc jump 1f; + + /* Single stepping only a single instruction, so clear the trace + * bit here. */ + r7 = syscfg; + bitclr (r7, 0); + syscfg = R7; + jump _ex_trap_c; + +1: + /* + * We were in an interrupt handler. By convention, all of them save + * SYSCFG with their first instruction, so by checking whether our + * RETX points at the entry point, we can determine whether to allow + * a single step, or whether to clear SYSCFG. + * + * First, find out the interrupt level and the event vector for it. + */ + p5.l = lo(EVT0); + p5.h = hi(EVT0); + p5 += -4; +2: + r7 = rot r7 by -1; + p5 += 4; + if !cc jump 2b; + + /* What we actually do is test for the _second_ instruction in the + * IRQ handler. That way, if there are insns following the restore + * of SYSCFG after leaving the handler, we will not turn off SYSCFG + * for them. */ + + r7 = [p5]; + r7 += 2; + r6 = RETX; + cc = R7 == R6; + if !cc jump _bfin_return_from_exception; + + r7 = syscfg; + bitclr (r7, 0); + syscfg = R7; + + /* Fall through to _bfin_return_from_exception. */ ENDPROC(_ex_single_step) ENTRY(_bfin_return_from_exception) @@ -234,20 +270,26 @@ ENTRY(_ex_trap_c) p5.l = _saved_icplb_fault_addr; [p5] = r7; - p4.l = __retx; - p4.h = __retx; + p4.l = _excpt_saved_stuff; + p4.h = _excpt_saved_stuff; + r6 = retx; [p4] = r6; - p4.l = lo(SAFE_USER_INSTRUCTION); - p4.h = hi(SAFE_USER_INSTRUCTION); - retx = p4; + + r6 = SYSCFG; + [p4 + 4] = r6; + BITCLR(r6, 0); + SYSCFG = r6; /* Disable all interrupts, but make sure level 5 is enabled so * we can switch to that level. Save the old mask. */ cli r6; - p4.l = _excpt_saved_imask; - p4.h = _excpt_saved_imask; - [p4] = r6; + [p4 + 8] = r6; + + p4.l = lo(SAFE_USER_INSTRUCTION); + p4.h = hi(SAFE_USER_INSTRUCTION); + retx = p4; + r6 = 0x3f; sti r6; @@ -295,6 +337,11 @@ ENTRY(_double_fault) */ SAVE_ALL_SYS + /* The dumping functions expect the return address in the RETI + * slot. */ + r6 = retx; + [sp + PT_PC] = r6; + r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */ SP += -12; call _double_fault_c; @@ -307,16 +354,17 @@ ENDPROC(_double_fault) ENTRY(_exception_to_level5) SAVE_ALL_SYS - p4.l = __retx; - p4.h = __retx; + p4.l = _excpt_saved_stuff; + p4.h = _excpt_saved_stuff; r6 = [p4]; [sp + PT_PC] = r6; + r6 = [p4 + 4]; + [sp + PT_SYSCFG] = r6; + /* Restore interrupt mask. We haven't pushed RETI, so this * doesn't enable interrupts until we return from this handler. */ - p4.l = _excpt_saved_imask; - p4.h = _excpt_saved_imask; - r6 = [p4]; + r6 = [p4 + 8]; sti r6; /* Restore the hardware error vector. */ @@ -1344,7 +1392,14 @@ ENTRY(_sys_call_table) .rept NR_syscalls-(.-_sys_call_table)/4 .long _sys_ni_syscall .endr -_excpt_saved_imask: + + /* + * Used to save the real RETX, IMASK and SYSCFG when temporarily + * storing safe values across the transition from exception to IRQ5. + */ +_excpt_saved_stuff: + .long 0; + .long 0; .long 0; _exception_stack: @@ -1358,7 +1413,3 @@ _exception_stack_top: _last_cplb_fault_retx: .long 0; #endif - /* Used to save the real RETX when temporarily storing a safe - * return address. */ -__retx: - .long 0; |