diff options
30 files changed, 2262 insertions, 57 deletions
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index 05ef5380a68..33ac1a9ac88 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -221,6 +221,13 @@ config SPARC64_SMP default y depends on SPARC64 && SMP +config EARLYFB + bool "Support for early boot text console" + default y + depends on SPARC64 + help + Say Y here to enable a faster early framebuffer boot console. + choice prompt "Kernel page size" if SPARC64 default SPARC64_PAGE_SIZE_8KB diff --git a/arch/sparc/Makefile b/arch/sparc/Makefile index dfe272d1446..113225b241e 100644 --- a/arch/sparc/Makefile +++ b/arch/sparc/Makefile @@ -27,6 +27,7 @@ AS := $(AS) -32 LDFLAGS := -m elf32_sparc CHECKFLAGS += -D__sparc__ export BITS := 32 +UTS_MACHINE := sparc #KBUILD_CFLAGS += -g -pipe -fcall-used-g5 -fcall-used-g7 KBUILD_CFLAGS += -m32 -pipe -mno-fpu -fcall-used-g5 -fcall-used-g7 @@ -46,6 +47,7 @@ CHECKFLAGS += -D__sparc__ -D__sparc_v9__ -D__arch64__ -m64 LDFLAGS := -m elf64_sparc export BITS := 64 +UTS_MACHINE := sparc64 KBUILD_CFLAGS += -m64 -pipe -mno-fpu -mcpu=ultrasparc -mcmodel=medlow \ -ffixed-g4 -ffixed-g5 -fcall-used-g7 -Wno-sign-compare \ diff --git a/arch/sparc/include/asm/btext.h b/arch/sparc/include/asm/btext.h new file mode 100644 index 00000000000..9b2bc6b6ed0 --- /dev/null +++ b/arch/sparc/include/asm/btext.h @@ -0,0 +1,6 @@ +#ifndef _SPARC_BTEXT_H +#define _SPARC_BTEXT_H + +extern int btext_find_display(void); + +#endif /* _SPARC_BTEXT_H */ diff --git a/arch/sparc/include/asm/leon.h b/arch/sparc/include/asm/leon.h index 28a42b73f64..3ea5964c43b 100644 --- a/arch/sparc/include/asm/leon.h +++ b/arch/sparc/include/asm/leon.h @@ -148,7 +148,7 @@ static inline unsigned long leon_load_reg(unsigned long paddr) return retval; } -extern inline void leon_srmmu_disabletlb(void) +static inline void leon_srmmu_disabletlb(void) { unsigned int retval; __asm__ __volatile__("lda [%%g0] %2, %0\n\t" : "=r"(retval) : "r"(0), @@ -158,7 +158,7 @@ extern inline void leon_srmmu_disabletlb(void) "i"(ASI_LEON_MMUREGS) : "memory"); } -extern inline void leon_srmmu_enabletlb(void) +static inline void leon_srmmu_enabletlb(void) { unsigned int retval; __asm__ __volatile__("lda [%%g0] %2, %0\n\t" : "=r"(retval) : "r"(0), @@ -190,7 +190,7 @@ extern void leon_init_IRQ(void); extern unsigned long last_valid_pfn; -extern inline unsigned long sparc_leon3_get_dcachecfg(void) +static inline unsigned long sparc_leon3_get_dcachecfg(void) { unsigned int retval; __asm__ __volatile__("lda [%1] %2, %0\n\t" : @@ -201,7 +201,7 @@ extern inline unsigned long sparc_leon3_get_dcachecfg(void) } /* enable snooping */ -extern inline void sparc_leon3_enable_snooping(void) +static inline void sparc_leon3_enable_snooping(void) { __asm__ __volatile__ ("lda [%%g0] 2, %%l1\n\t" "set 0x800000, %%l2\n\t" @@ -209,7 +209,14 @@ extern inline void sparc_leon3_enable_snooping(void) "sta %%l2, [%%g0] 2\n\t" : : : "l1", "l2"); }; -extern inline void sparc_leon3_disable_cache(void) +static inline int sparc_leon3_snooping_enabled(void) +{ + u32 cctrl; + __asm__ __volatile__("lda [%%g0] 2, %0\n\t" : "=r"(cctrl)); + return (cctrl >> 23) & 1; +}; + +static inline void sparc_leon3_disable_cache(void) { __asm__ __volatile__ ("lda [%%g0] 2, %%l1\n\t" "set 0x00000f, %%l2\n\t" @@ -340,6 +347,30 @@ extern int leon_flush_needed(void); extern void leon_switch_mm(void); extern int srmmu_swprobe_trace; +#ifdef CONFIG_SMP +extern int leon_smp_nrcpus(void); +extern void leon_clear_profile_irq(int cpu); +extern void leon_smp_done(void); +extern void leon_boot_cpus(void); +extern int leon_boot_one_cpu(int i); +void leon_init_smp(void); +extern void cpu_probe(void); +extern void cpu_idle(void); +extern void init_IRQ(void); +extern void cpu_panic(void); +extern int __leon_processor_id(void); +void leon_enable_irq_cpu(unsigned int irq_nr, unsigned int cpu); + +extern unsigned int real_irq_entry[], smpleon_ticker[]; +extern unsigned int patchme_maybe_smp_msg[]; +extern unsigned long trapbase_cpu1[]; +extern unsigned long trapbase_cpu2[]; +extern unsigned long trapbase_cpu3[]; +extern unsigned int t_nmi[], linux_trap_ipi15_leon[]; +extern unsigned int linux_trap_ipi15_sun4m[]; + +#endif /* CONFIG_SMP */ + #endif /* __KERNEL__ */ #endif /* __ASSEMBLY__ */ @@ -356,6 +387,10 @@ extern int srmmu_swprobe_trace; #define leon_switch_mm() do {} while (0) #define leon_init_IRQ() do {} while (0) #define init_leon() do {} while (0) +#define leon_smp_done() do {} while (0) +#define leon_boot_cpus() do {} while (0) +#define leon_boot_one_cpu(i) 1 +#define leon_init_smp() do {} while (0) #endif /* !defined(CONFIG_SPARC_LEON) */ diff --git a/arch/sparc/include/asm/rwsem.h b/arch/sparc/include/asm/rwsem.h index 1dc129ac2fe..6e5621006f8 100644 --- a/arch/sparc/include/asm/rwsem.h +++ b/arch/sparc/include/asm/rwsem.h @@ -35,8 +35,8 @@ struct rw_semaphore { #endif #define __RWSEM_INITIALIZER(name) \ -{ RWSEM_UNLOCKED_VALUE, SPIN_LOCK_UNLOCKED, LIST_HEAD_INIT((name).wait_list) \ - __RWSEM_DEP_MAP_INIT(name) } +{ RWSEM_UNLOCKED_VALUE, __SPIN_LOCK_UNLOCKED((name).wait_lock), \ + LIST_HEAD_INIT((name).wait_list) __RWSEM_DEP_MAP_INIT(name) } #define DECLARE_RWSEM(name) \ struct rw_semaphore name = __RWSEM_INITIALIZER(name) diff --git a/arch/sparc/include/asm/smp_32.h b/arch/sparc/include/asm/smp_32.h index 58101dc7049..841905c1021 100644 --- a/arch/sparc/include/asm/smp_32.h +++ b/arch/sparc/include/asm/smp_32.h @@ -106,6 +106,15 @@ static inline int hard_smp4d_processor_id(void) return cpuid; } +extern inline int hard_smpleon_processor_id(void) +{ + int cpuid; + __asm__ __volatile__("rd %%asr17,%0\n\t" + "srl %0,28,%0" : + "=&r" (cpuid) : ); + return cpuid; +} + #ifndef MODULE static inline int hard_smp_processor_id(void) { diff --git a/arch/sparc/kernel/Makefile b/arch/sparc/kernel/Makefile index 5b47fab9966..c6316142db4 100644 --- a/arch/sparc/kernel/Makefile +++ b/arch/sparc/kernel/Makefile @@ -72,7 +72,7 @@ obj-y += dma.o obj-$(CONFIG_SPARC32_PCI) += pcic.o obj-$(CONFIG_SMP) += trampoline_$(BITS).o smp_$(BITS).o -obj-$(CONFIG_SPARC32_SMP) += sun4m_smp.o sun4d_smp.o +obj-$(CONFIG_SPARC32_SMP) += sun4m_smp.o sun4d_smp.o leon_smp.o obj-$(CONFIG_SPARC64_SMP) += hvtramp.o obj-y += auxio_$(BITS).o @@ -87,6 +87,7 @@ obj-$(CONFIG_KGDB) += kgdb_$(BITS).o obj-$(CONFIG_DYNAMIC_FTRACE) += ftrace.o CFLAGS_REMOVE_ftrace.o := -pg +obj-$(CONFIG_EARLYFB) += btext.o obj-$(CONFIG_STACKTRACE) += stacktrace.o # sparc64 PCI obj-$(CONFIG_SPARC64_PCI) += pci.o pci_common.o psycho_common.o diff --git a/arch/sparc/kernel/apc.c b/arch/sparc/kernel/apc.c index 9c115823c4b..71ec90b9e31 100644 --- a/arch/sparc/kernel/apc.c +++ b/arch/sparc/kernel/apc.c @@ -10,7 +10,6 @@ #include <linux/errno.h> #include <linux/init.h> #include <linux/miscdevice.h> -#include <linux/smp_lock.h> #include <linux/pm.h> #include <linux/of.h> #include <linux/of_device.h> @@ -76,7 +75,6 @@ static inline void apc_free(struct of_device *op) static int apc_open(struct inode *inode, struct file *f) { - cycle_kernel_lock(); return 0; } @@ -87,61 +85,46 @@ static int apc_release(struct inode *inode, struct file *f) static long apc_ioctl(struct file *f, unsigned int cmd, unsigned long __arg) { - __u8 inarg, __user *arg; - - arg = (__u8 __user *) __arg; - - lock_kernel(); + __u8 inarg, __user *arg = (__u8 __user *) __arg; switch (cmd) { case APCIOCGFANCTL: - if (put_user(apc_readb(APC_FANCTL_REG) & APC_REGMASK, arg)) { - unlock_kernel(); + if (put_user(apc_readb(APC_FANCTL_REG) & APC_REGMASK, arg)) return -EFAULT; - } break; case APCIOCGCPWR: - if (put_user(apc_readb(APC_CPOWER_REG) & APC_REGMASK, arg)) { - unlock_kernel(); + if (put_user(apc_readb(APC_CPOWER_REG) & APC_REGMASK, arg)) return -EFAULT; - } break; case APCIOCGBPORT: - if (put_user(apc_readb(APC_BPORT_REG) & APC_BPMASK, arg)) { - unlock_kernel(); + if (put_user(apc_readb(APC_BPORT_REG) & APC_BPMASK, arg)) return -EFAULT; - } break; case APCIOCSFANCTL: - if (get_user(inarg, arg)) { - unlock_kernel(); + if (get_user(inarg, arg)) return -EFAULT; - } apc_writeb(inarg & APC_REGMASK, APC_FANCTL_REG); break; + case APCIOCSCPWR: - if (get_user(inarg, arg)) { - unlock_kernel(); + if (get_user(inarg, arg)) return -EFAULT; - } apc_writeb(inarg & APC_REGMASK, APC_CPOWER_REG); break; + case APCIOCSBPORT: - if (get_user(inarg, arg)) { - unlock_kernel(); + if (get_user(inarg, arg)) return -EFAULT; - } apc_writeb(inarg & APC_BPMASK, APC_BPORT_REG); break; + default: - unlock_kernel(); return -EINVAL; }; - unlock_kernel(); return 0; } diff --git a/arch/sparc/kernel/auxio_32.c b/arch/sparc/kernel/auxio_32.c index 45c41232fc4..ee8d214cae1 100644 --- a/arch/sparc/kernel/auxio_32.c +++ b/arch/sparc/kernel/auxio_32.c @@ -28,6 +28,7 @@ void __init auxio_probe(void) struct resource r; switch (sparc_cpu_model) { + case sparc_leon: case sun4d: case sun4: return; diff --git a/arch/sparc/kernel/btext.c b/arch/sparc/kernel/btext.c new file mode 100644 index 00000000000..8cc2d56ffe9 --- /dev/null +++ b/arch/sparc/kernel/btext.c @@ -0,0 +1,673 @@ +/* + * Procedures for drawing on the screen early on in the boot process. + * + * Benjamin Herrenschmidt <benh@kernel.crashing.org> + */ +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/console.h> + +#include <asm/btext.h> +#include <asm/oplib.h> +#include <asm/io.h> + +#define NO_SCROLL + +#ifndef NO_SCROLL +static void scrollscreen(void); +#endif + +static void draw_byte(unsigned char c, long locX, long locY); +static void draw_byte_32(unsigned char *bits, unsigned int *base, int rb); +static void draw_byte_16(unsigned char *bits, unsigned int *base, int rb); +static void draw_byte_8(unsigned char *bits, unsigned int *base, int rb); + +#define __force_data __attribute__((__section__(".data"))) + +static int g_loc_X __force_data; +static int g_loc_Y __force_data; +static int g_max_loc_X __force_data; +static int g_max_loc_Y __force_data; + +static int dispDeviceRowBytes __force_data; +static int dispDeviceDepth __force_data; +static int dispDeviceRect[4] __force_data; +static unsigned char *dispDeviceBase __force_data; + +#define cmapsz (16*256) + +static unsigned char vga_font[cmapsz]; + +static int __init btext_initialize(unsigned int node) +{ + unsigned int width, height, depth, pitch; + unsigned long address = 0; + u32 prop; + + if (prom_getproperty(node, "width", (char *)&width, 4) < 0) + return -EINVAL; + if (prom_getproperty(node, "height", (char *)&height, 4) < 0) + return -EINVAL; + if (prom_getproperty(node, "depth", (char *)&depth, 4) < 0) + return -EINVAL; + pitch = width * ((depth + 7) / 8); + + if (prom_getproperty(node, "linebytes", (char *)&prop, 4) >= 0 && + prop != 0xffffffffu) + pitch = prop; + + if (pitch == 1) + pitch = 0x1000; + + if (prom_getproperty(node, "address", (char *)&prop, 4) >= 0) + address = prop; + + /* FIXME: Add support for PCI reg properties. Right now, only + * reliable on macs + */ + if (address == 0) + return -EINVAL; + + g_loc_X = 0; + g_loc_Y = 0; + g_max_loc_X = width / 8; + g_max_loc_Y = height / 16; + dispDeviceBase = (unsigned char *)address; + dispDeviceRowBytes = pitch; + dispDeviceDepth = depth == 15 ? 16 : depth; + dispDeviceRect[0] = dispDeviceRect[1] = 0; + dispDeviceRect[2] = width; + dispDeviceRect[3] = height; + + return 0; +} + +/* Calc the base address of a given point (x,y) */ +static unsigned char * calc_base(int x, int y) +{ + unsigned char *base = dispDeviceBase; + + base += (x + dispDeviceRect[0]) * (dispDeviceDepth >> 3); + base += (y + dispDeviceRect[1]) * dispDeviceRowBytes; + return base; +} + +static void btext_clearscreen(void) +{ + unsigned int *base = (unsigned int *)calc_base(0, 0); + unsigned long width = ((dispDeviceRect[2] - dispDeviceRect[0]) * + (dispDeviceDepth >> 3)) >> 2; + int i,j; + + for (i=0; i<(dispDeviceRect[3] - dispDeviceRect[1]); i++) + { + unsigned int *ptr = base; + for(j=width; j; --j) + *(ptr++) = 0; + base += (dispDeviceRowBytes >> 2); + } +} + +#ifndef NO_SCROLL +static void scrollscreen(void) +{ + unsigned int *src = (unsigned int *)calc_base(0,16); + unsigned int *dst = (unsigned int *)calc_base(0,0); + unsigned long width = ((dispDeviceRect[2] - dispDeviceRect[0]) * + (dispDeviceDepth >> 3)) >> 2; + int i,j; + + for (i=0; i<(dispDeviceRect[3] - dispDeviceRect[1] - 16); i++) + { + unsigned int *src_ptr = src; + unsigned int *dst_ptr = dst; + for(j=width; j; --j) + *(dst_ptr++) = *(src_ptr++); + src += (dispDeviceRowBytes >> 2); + dst += (dispDeviceRowBytes >> 2); + } + for (i=0; i<16; i++) + { + unsigned int *dst_ptr = dst; + for(j=width; j; --j) + *(dst_ptr++) = 0; + dst += (dispDeviceRowBytes >> 2); + } +} +#endif /* ndef NO_SCROLL */ + +void btext_drawchar(char c) +{ + int cline = 0; +#ifdef NO_SCROLL + int x; +#endif + switch (c) { + case '\b': + if (g_loc_X > 0) + --g_loc_X; + break; + case '\t': + g_loc_X = (g_loc_X & -8) + 8; + break; + case '\r': + g_loc_X = 0; + break; + case '\n': + g_loc_X = 0; + g_loc_Y++; + cline = 1; + break; + default: + draw_byte(c, g_loc_X++, g_loc_Y); + } + if (g_loc_X >= g_max_loc_X) { + g_loc_X = 0; + g_loc_Y++; + cline = 1; + } +#ifndef NO_SCROLL + while (g_loc_Y >= g_max_loc_Y) { + scrollscreen(); + g_loc_Y--; + } +#else + /* wrap around from bottom to top of screen so we don't + waste time scrolling each line. -- paulus. */ + if (g_loc_Y >= g_max_loc_Y) + g_loc_Y = 0; + if (cline) { + for (x = 0; x < g_max_loc_X; ++x) + draw_byte(' ', x, g_loc_Y); + } +#endif +} + +static void btext_drawtext(const char *c, unsigned int len) +{ + while (len--) + btext_drawchar(*c++); +} + +static void draw_byte(unsigned char c, long locX, long locY) +{ + unsigned char *base = calc_base(locX << 3, locY << 4); + unsigned char *font = &vga_font[((unsigned int)c) * 16]; + int rb = dispDeviceRowBytes; + + switch(dispDeviceDepth) { + case 24: + case 32: + draw_byte_32(font, (unsigned int *)base, rb); + break; + case 15: + case 16: + draw_byte_16(font, (unsigned int *)base, rb); + break; + case 8: + draw_byte_8(font, (unsigned int *)base, rb); + break; + } +} + +static unsigned int expand_bits_8[16] = { + 0x00000000, + 0x000000ff, + 0x0000ff00, + 0x0000ffff, + 0x00ff0000, + 0x00ff00ff, + 0x00ffff00, + 0x00ffffff, + 0xff000000, + 0xff0000ff, + 0xff00ff00, + 0xff00ffff, + 0xffff0000, + 0xffff00ff, + 0xffffff00, + 0xffffffff +}; + +static unsigned int expand_bits_16[4] = { + 0x00000000, + 0x0000ffff, + 0xffff0000, + 0xffffffff +}; + + +static void draw_byte_32(unsigned char *font, unsigned int *base, int rb) +{ + int l, bits; + int fg = 0xFFFFFFFFUL; + int bg = 0x00000000UL; + + for (l = 0; l < 16; ++l) + { + bits = *font++; + base[0] = (-(bits >> 7) & fg) ^ bg; + base[1] = (-((bits >> 6) & 1) & fg) ^ bg; + base[2] = (-((bits >> 5) & 1) & fg) ^ bg; + base[3] = (-((bits >> 4) & 1) & fg) ^ bg; + base[4] = (-((bits >> 3) & 1) & fg) ^ bg; + base[5] = (-((bits >> 2) & 1) & fg) ^ bg; + base[6] = (-((bits >> 1) & 1) & fg) ^ bg; + base[7] = (-(bits & 1) & fg) ^ bg; + base = (unsigned int *) ((char *)base + rb); + } +} + +static void draw_byte_16(unsigned char *font, unsigned int *base, int rb) +{ + int l, bits; + int fg = 0xFFFFFFFFUL; + int bg = 0x00000000UL; + unsigned int *eb = (int *)expand_bits_16; + + for (l = 0; l < 16; ++l) + { + bits = *font++; + base[0] = (eb[bits >> 6] & fg) ^ bg; + base[1] = (eb[(bits >> 4) & 3] & fg) ^ bg; + base[2] = (eb[(bits >> 2) & 3] & fg) ^ bg; + base[3] = (eb[bits & 3] & fg) ^ bg; + base = (unsigned int *) ((char *)base + rb); + } +} + +static void draw_byte_8(unsigned char *font, unsigned int *base, int rb) +{ + int l, bits; + int fg = 0x0F0F0F0FUL; + int bg = 0x00000000UL; + unsigned int *eb = (int *)expand_bits_8; + + for (l = 0; l < 16; ++l) + { + bits = *font++; + base[0] = (eb[bits >> 4] & fg) ^ bg; + base[1] = (eb[bits & 0xf] & fg) ^ bg; + base = (unsigned int *) ((char *)base + rb); + } +} + +static void btext_console_write(struct console *con, const char *s, + unsigned int n) +{ + btext_drawtext(s, n); +} + +static struct console btext_console = { + .name = "btext", + .write = btext_console_write, + .flags = CON_PRINTBUFFER | CON_ENABLED | CON_BOOT | CON_ANYTIME, + .index = 0, +}; + +int __init btext_find_display(void) +{ + unsigned int node; + char type[32]; + int ret; + + node = prom_inst2pkg(prom_stdout); + if (prom_getproperty(node, "device_type", type, 32) < 0) + return -ENODEV; + if (strcmp(type, "display")) + return -ENODEV; + + ret = btext_initialize(node); + if (!ret) { + btext_clearscreen(); + register_console(&btext_console); + } + return ret; +} + +static unsigned char vga_font[cmapsz] = { +0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, +0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7e, 0x81, 0xa5, 0x81, 0x81, 0xbd, +0x99, 0x81, 0x81, 0x7e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7e, 0xff, +0xdb, 0xff, 0xff, 0xc3, 0xe7, 0xff, 0xff, 0x7e, 0x00, 0x00, 0x00, 0x00, +0x00, 0x00, 0x00, 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0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x00, 0x00, 0x00, +0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, +0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x0c, 0x0c, +0x0c, 0x0c, 0x0c, 0xec, 0x6c, 0x6c, 0x3c, 0x1c, 0x00, 0x00, 0x00, 0x00, +0x00, 0xd8, 0x6c, 0x6c, 0x6c, 0x6c, 0x6c, 0x00, 0x00, 0x00, 0x00, 0x00, +0x00, 0x00, 0x00, 0x00, 0x00, 0x70, 0xd8, 0x30, 0x60, 0xc8, 0xf8, 0x00, +0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, +0x7c, 0x7c, 0x7c, 0x7c, 0x7c, 0x7c, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x00, +0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, +0x00, 0x00, 0x00, 0x00, +}; diff --git a/arch/sparc/kernel/cpu.c b/arch/sparc/kernel/cpu.c index 1446df90ef8..e447938d39c 100644 --- a/arch/sparc/kernel/cpu.c +++ b/arch/sparc/kernel/cpu.c @@ -185,6 +185,17 @@ static const struct manufacturer_info __initconst manufacturer_info[] = { FPU(-1, NULL) } },{ + 0xF, /* Aeroflex Gaisler */ + .cpu_info = { + CPU(3, "LEON"), + CPU(-1, NULL) + }, + .fpu_info = { + FPU(2, "GRFPU"), + FPU(3, "GRFPU-Lite"), + FPU(-1, NULL) + } +},{ 0x17, .cpu_info = { CPU_PMU(0x10, "TI UltraSparc I (SpitFire)", "ultra12"), diff --git a/arch/sparc/kernel/entry.S b/arch/sparc/kernel/entry.S index f41ecc5ac0b..ec9c7bc67d2 100644 --- a/arch/sparc/kernel/entry.S +++ b/arch/sparc/kernel/entry.S @@ -400,6 +400,39 @@ linux_trap_ipi15_sun4d: /* FIXME */ 1: b,a 1b +#ifdef CONFIG_SPARC_LEON + + .globl smpleon_ticker + /* SMP per-cpu ticker interrupts are handled specially. */ +smpleon_ticker: + SAVE_ALL + or %l0, PSR_PIL, %g2 + wr %g2, 0x0, %psr + WRITE_PAUSE + wr %g2, PSR_ET, %psr + WRITE_PAUSE + call leon_percpu_timer_interrupt + add %sp, STACKFRAME_SZ, %o0 + wr %l0, PSR_ET, %psr + WRITE_PAUSE + RESTORE_ALL + + .align 4 + .globl linux_trap_ipi15_leon +linux_trap_ipi15_leon: + SAVE_ALL + or %l0, PSR_PIL, %l4 + wr %l4, 0x0, %psr + WRITE_PAUSE + wr %l4, PSR_ET, %psr + WRITE_PAUSE + call leon_cross_call_irq + nop + b ret_trap_lockless_ipi + clr %l6 + +#endif /* CONFIG_SPARC_LEON */ + #endif /* CONFIG_SMP */ /* This routine handles illegal instructions and privileged diff --git a/arch/sparc/kernel/head_32.S b/arch/sparc/kernel/head_32.S index 439d82a95ac..21bb2590d4a 100644 --- a/arch/sparc/kernel/head_32.S +++ b/arch/sparc/kernel/head_32.S @@ -811,9 +811,31 @@ found_version: got_prop: #ifdef CONFIG_SPARC_LEON /* no cpu-type check is needed, it is a SPARC-LEON */ +#ifdef CONFIG_SMP + ba leon_smp_init + nop + + .global leon_smp_init +leon_smp_init: + sethi %hi(boot_cpu_id), %g1 ! master always 0 + stb %g0, [%g1 + %lo(boot_cpu_id)] + sethi %hi(boot_cpu_id4), %g1 ! master always 0 + stb %g0, [%g1 + %lo(boot_cpu_id4)] + + rd %asr17,%g1 + srl %g1,28,%g1 + + cmp %g0,%g1 + beq sun4c_continue_boot !continue with master + nop + + ba leon_smp_cpu_startup + nop +#else ba sun4c_continue_boot nop #endif +#endif set cputypval, %o2 ldub [%o2 + 0x4], %l1 diff --git a/arch/sparc/kernel/ioport.c b/arch/sparc/kernel/ioport.c index 9f61fd8cbb7..3c8c44f6a41 100644 --- a/arch/sparc/kernel/ioport.c +++ b/arch/sparc/kernel/ioport.c @@ -48,8 +48,13 @@ #include <asm/dma.h> #include <asm/iommu.h> #include <asm/io-unit.h> +#include <asm/leon.h> +#ifdef CONFIG_SPARC_LEON +#define mmu_inval_dma_area(p, l) leon_flush_dcache_all() +#else #define mmu_inval_dma_area(p, l) /* Anton pulled it out for 2.4.0-xx */ +#endif static struct resource *_sparc_find_resource(struct resource *r, unsigned long); diff --git a/arch/sparc/kernel/irq_64.c b/arch/sparc/kernel/irq_64.c index 8ab1d4728a4..ce996f97855 100644 --- a/arch/sparc/kernel/irq_64.c +++ b/arch/sparc/kernel/irq_64.c @@ -187,7 +187,7 @@ int show_interrupts(struct seq_file *p, void *v) for_each_online_cpu(j) seq_printf(p, "%10u ", kstat_irqs_cpu(i, j)); #endif - seq_printf(p, " %9s", irq_desc[i].chip->typename); + seq_printf(p, " %9s", irq_desc[i].chip->name); seq_printf(p, " %s", action->name); for (action=action->next; action; action = action->next) @@ -484,7 +484,7 @@ static void sun4v_virq_eoi(unsigned int virt_irq) } static struct irq_chip sun4u_irq = { - .typename = "sun4u", + .name = "sun4u", .enable = sun4u_irq_enable, .disable = sun4u_irq_disable, .eoi = sun4u_irq_eoi, @@ -492,7 +492,7 @@ static struct irq_chip sun4u_irq = { }; static struct irq_chip sun4v_irq = { - .typename = "sun4v", + .name = "sun4v", .enable = sun4v_irq_enable, .disable = sun4v_irq_disable, .eoi = sun4v_irq_eoi, @@ -500,7 +500,7 @@ static struct irq_chip sun4v_irq = { }; static struct irq_chip sun4v_virq = { - .typename = "vsun4v", + .name = "vsun4v", .enable = sun4v_virq_enable, .disable = sun4v_virq_disable, .eoi = sun4v_virq_eoi, diff --git a/arch/sparc/kernel/leon_kernel.c b/arch/sparc/kernel/leon_kernel.c index 54d8a5bd482..87f1760c0aa 100644 --- a/arch/sparc/kernel/leon_kernel.c +++ b/arch/sparc/kernel/leon_kernel.c @@ -12,11 +12,14 @@ #include <linux/of_platform.h> #include <linux/interrupt.h> #include <linux/of_device.h> + #include <asm/oplib.h> #include <asm/timer.h> #include <asm/prom.h> #include <asm/leon.h> #include <asm/leon_amba.h> +#include <asm/traps.h> +#include <asm/cacheflush.h> #include "prom.h" #include "irq.h" @@ -115,6 +118,21 @@ void __init leon_init_timers(irq_handler_t counter_fn) (((1000000 / 100) - 1))); LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].ctrl, 0); +#ifdef CONFIG_SMP + leon_percpu_timer_dev[0].start = (int)leon3_gptimer_regs; + leon_percpu_timer_dev[0].irq = leon3_gptimer_irq+1; + + if (!(LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->config) & + (1<<LEON3_GPTIMER_SEPIRQ))) { + prom_printf("irq timer not configured with seperate irqs \n"); + BUG(); + } + + LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[1].val, 0); + LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[1].rld, (((1000000/100) - 1))); + LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[1].ctrl, 0); +# endif + } else { printk(KERN_ERR "No Timer/irqctrl found\n"); BUG(); @@ -130,11 +148,41 @@ void __init leon_init_timers(irq_handler_t counter_fn) prom_halt(); } +# ifdef CONFIG_SMP + { + unsigned long flags; + struct tt_entry *trap_table = &sparc_ttable[SP_TRAP_IRQ1 + (leon_percpu_timer_dev[0].irq - 1)]; + + /* For SMP we use the level 14 ticker, however the bootup code + * has copied the firmwares level 14 vector into boot cpu's + * trap table, we must fix this now or we get squashed. + */ + local_irq_save(flags); + + patchme_maybe_smp_msg[0] = 0x01000000; /* NOP out the branch */ + + /* Adjust so that we jump directly to smpleon_ticker */ + trap_table->inst_three += smpleon_ticker - real_irq_entry; + + local_flush_cache_all(); + local_irq_restore(flags); + } +# endif + if (leon3_gptimer_regs) { LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].ctrl, LEON3_GPTIMER_EN | LEON3_GPTIMER_RL | LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN); + +#ifdef CONFIG_SMP + LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[1].ctrl, + LEON3_GPTIMER_EN | + LEON3_GPTIMER_RL | + LEON3_GPTIMER_LD | + LEON3_GPTIMER_IRQEN); +#endif + } } @@ -175,6 +223,42 @@ void __init leon_node_init(struct device_node *dp, struct device_node ***nextp) } } +#ifdef CONFIG_SMP + +void leon_set_cpu_int(int cpu, int level) +{ + unsigned long mask; + mask = get_irqmask(level); + LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->force[cpu], mask); +} + +static void leon_clear_ipi(int cpu, int level) +{ + unsigned long mask; + mask = get_irqmask(level); + LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->force[cpu], mask<<16); +} + +static void leon_set_udt(int cpu) +{ +} + +void leon_clear_profile_irq(int cpu) +{ +} + +void leon_enable_irq_cpu(unsigned int irq_nr, unsigned int cpu) +{ + unsigned long mask, flags, *addr; + mask = get_irqmask(irq_nr); + local_irq_save(flags); + addr = (unsigned long *)&(leon3_irqctrl_regs->mask[cpu]); + LEON3_BYPASS_STORE_PA(addr, (LEON3_BYPASS_LOAD_PA(addr) | (mask))); + local_irq_restore(flags); +} + +#endif + void __init leon_init_IRQ(void) { sparc_init_timers = leon_init_timers; diff --git a/arch/sparc/kernel/leon_smp.c b/arch/sparc/kernel/leon_smp.c new file mode 100644 index 00000000000..05c0dadd637 --- /dev/null +++ b/arch/sparc/kernel/leon_smp.c @@ -0,0 +1,468 @@ +/* leon_smp.c: Sparc-Leon SMP support. + * + * based on sun4m_smp.c + * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) + * Copyright (C) 2009 Daniel Hellstrom (daniel@gaisler.com) Aeroflex Gaisler AB + * Copyright (C) 2009 Konrad Eisele (konrad@gaisler.com) Aeroflex Gaisler AB + */ + +#include <asm/head.h> + +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/threads.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/interrupt.h> +#include <linux/kernel_stat.h> +#include <linux/init.h> +#include <linux/spinlock.h> +#include <linux/mm.h> +#include <linux/swap.h> +#include <linux/profile.h> +#include <linux/pm.h> +#include <linux/delay.h> + +#include <asm/cacheflush.h> +#include <asm/tlbflush.h> + +#include <asm/ptrace.h> +#include <asm/atomic.h> +#include <asm/irq_regs.h> + +#include <asm/delay.h> +#include <asm/irq.h> +#include <asm/page.h> +#include <asm/pgalloc.h> +#include <asm/pgtable.h> +#include <asm/oplib.h> +#include <asm/cpudata.h> +#include <asm/asi.h> +#include <asm/leon.h> +#include <asm/leon_amba.h> + +#ifdef CONFIG_SPARC_LEON + +#include "irq.h" + +extern ctxd_t *srmmu_ctx_table_phys; +static int smp_processors_ready; +extern volatile unsigned long cpu_callin_map[NR_CPUS]; +extern unsigned char boot_cpu_id; +extern cpumask_t smp_commenced_mask; +void __init leon_configure_cache_smp(void); + +static inline unsigned long do_swap(volatile unsigned long *ptr, + unsigned long val) +{ + __asm__ __volatile__("swapa [%1] %2, %0\n\t" : "=&r"(val) + : "r"(ptr), "i"(ASI_LEON_DCACHE_MISS) + : "memory"); + return val; +} + +static void smp_setup_percpu_timer(void); + +void __cpuinit leon_callin(void) +{ + int cpuid = hard_smpleon_processor_id(); + + local_flush_cache_all(); + local_flush_tlb_all(); + leon_configure_cache_smp(); + + /* Get our local ticker going. */ + smp_setup_percpu_timer(); + + calibrate_delay(); + smp_store_cpu_info(cpuid); + + local_flush_cache_all(); + local_flush_tlb_all(); + + /* + * Unblock the master CPU _only_ when the scheduler state + * of all secondary CPUs will be up-to-date, so after + * the SMP initialization the master will be just allowed + * to call the scheduler code. + * Allow master to continue. + */ + do_swap(&cpu_callin_map[cpuid], 1); + + local_flush_cache_all(); + local_flush_tlb_all(); + + cpu_probe(); + + /* Fix idle thread fields. */ + __asm__ __volatile__("ld [%0], %%g6\n\t" : : "r"(¤t_set[cpuid]) + : "memory" /* paranoid */); + + /* Attach to the address space of init_task. */ + atomic_inc(&init_mm.mm_count); + current->active_mm = &init_mm; + + while (!cpu_isset(cpuid, smp_commenced_mask)) + mb(); + + local_irq_enable(); + cpu_set(cpuid, cpu_online_map); +} + +/* + * Cycle through the processors asking the PROM to start each one. + */ + +extern struct linux_prom_registers smp_penguin_ctable; + +void __init leon_configure_cache_smp(void) +{ + unsigned long cfg = sparc_leon3_get_dcachecfg(); + int me = smp_processor_id(); + + if (ASI_LEON3_SYSCTRL_CFG_SSIZE(cfg) > 4) { + printk(KERN_INFO "Note: SMP with snooping only works on 4k cache, found %dk(0x%x) on cpu %d, disabling caches\n", + (unsigned int)ASI_LEON3_SYSCTRL_CFG_SSIZE(cfg), + (unsigned int)cfg, (unsigned int)me); + sparc_leon3_disable_cache(); + } else { + if (cfg & ASI_LEON3_SYSCTRL_CFG_SNOOPING) { + sparc_leon3_enable_snooping(); + } else { + printk(KERN_INFO "Note: You have to enable snooping in the vhdl model cpu %d, disabling caches\n", + me); + sparc_leon3_disable_cache(); + } + } + + local_flush_cache_all(); + local_flush_tlb_all(); +} + +void leon_smp_setbroadcast(unsigned int mask) +{ + int broadcast = + ((LEON3_BYPASS_LOAD_PA(&(leon3_irqctrl_regs->mpstatus)) >> + LEON3_IRQMPSTATUS_BROADCAST) & 1); + if (!broadcast) { + prom_printf("######## !!!! The irqmp-ctrl must have broadcast enabled, smp wont work !!!!! ####### nr cpus: %d\n", + leon_smp_nrcpus()); + if (leon_smp_nrcpus() > 1) { + BUG(); + } else { + prom_printf("continue anyway\n"); + return; + } + } + LEON_BYPASS_STORE_PA(&(leon3_irqctrl_regs->mpbroadcast), mask); +} + +unsigned int leon_smp_getbroadcast(void) +{ + unsigned int mask; + mask = LEON_BYPASS_LOAD_PA(&(leon3_irqctrl_regs->mpbroadcast)); + return mask; +} + +int leon_smp_nrcpus(void) +{ + int nrcpu = + ((LEON3_BYPASS_LOAD_PA(&(leon3_irqctrl_regs->mpstatus)) >> + LEON3_IRQMPSTATUS_CPUNR) & 0xf) + 1; + return nrcpu; +} + +void __init leon_boot_cpus(void) +{ + int nrcpu = leon_smp_nrcpus(); + int me = smp_processor_id(); + + printk(KERN_INFO "%d:(%d:%d) cpus mpirq at 0x%x \n", (unsigned int)me, + (unsigned int)nrcpu, (unsigned int)NR_CPUS, + (unsigned int)&(leon3_irqctrl_regs->mpstatus)); + + leon_enable_irq_cpu(LEON3_IRQ_CROSS_CALL, me); + leon_enable_irq_cpu(LEON3_IRQ_TICKER, me); + leon_enable_irq_cpu(LEON3_IRQ_RESCHEDULE, me); + + leon_smp_setbroadcast(1 << LEON3_IRQ_TICKER); + + leon_configure_cache_smp(); + smp_setup_percpu_timer(); + local_flush_cache_all(); + +} + +int __cpuinit leon_boot_one_cpu(int i) +{ + + struct task_struct *p; + int timeout; + + /* Cook up an idler for this guy. */ + p = fork_idle(i); + + current_set[i] = task_thread_info(p); + + /* See trampoline.S:leon_smp_cpu_startup for details... + * Initialize the contexts table + * Since the call to prom_startcpu() trashes the structure, + * we need to re-initialize it for each cpu + */ + smp_penguin_ctable.which_io = 0; + smp_penguin_ctable.phys_addr = (unsigned int)srmmu_ctx_table_phys; + smp_penguin_ctable.reg_size = 0; + + /* whirrr, whirrr, whirrrrrrrrr... */ + printk(KERN_INFO "Starting CPU %d : (irqmp: 0x%x)\n", (unsigned int)i, + (unsigned int)&leon3_irqctrl_regs->mpstatus); + local_flush_cache_all(); + + LEON_BYPASS_STORE_PA(&(leon3_irqctrl_regs->mpstatus), 1 << i); + + /* wheee... it's going... */ + for (timeout = 0; timeout < 10000; timeout++) { + if (cpu_callin_map[i]) + break; + udelay(200); + } + printk(KERN_INFO "Started CPU %d \n", (unsigned int)i); + + if (!(cpu_callin_map[i])) { + printk(KERN_ERR "Processor %d is stuck.\n", i); + return -ENODEV; + } else { + leon_enable_irq_cpu(LEON3_IRQ_CROSS_CALL, i); + leon_enable_irq_cpu(LEON3_IRQ_TICKER, i); + leon_enable_irq_cpu(LEON3_IRQ_RESCHEDULE, i); + } + + local_flush_cache_all(); + return 0; +} + +void __init leon_smp_done(void) +{ + + int i, first; + int *prev; + + /* setup cpu list for irq rotation */ + first = 0; + prev = &first; + for (i = 0; i < NR_CPUS; i++) { + if (cpu_online(i)) { + *prev = i; + prev = &cpu_data(i).next; + } + } + *prev = first; + local_flush_cache_all(); + + /* Free unneeded trap tables */ + if (!cpu_isset(1, cpu_present_map)) { + ClearPageReserved(virt_to_page(trapbase_cpu1)); + init_page_count(virt_to_page(trapbase_cpu1)); + free_page((unsigned long)trapbase_cpu1); + totalram_pages++; + num_physpages++; + } + if (!cpu_isset(2, cpu_present_map)) { + ClearPageReserved(virt_to_page(trapbase_cpu2)); + init_page_count(virt_to_page(trapbase_cpu2)); + free_page((unsigned long)trapbase_cpu2); + totalram_pages++; + num_physpages++; + } + if (!cpu_isset(3, cpu_present_map)) { + ClearPageReserved(virt_to_page(trapbase_cpu3)); + init_page_count(virt_to_page(trapbase_cpu3)); + free_page((unsigned long)trapbase_cpu3); + totalram_pages++; + num_physpages++; + } + /* Ok, they are spinning and ready to go. */ + smp_processors_ready = 1; + +} + +void leon_irq_rotate(int cpu) +{ +} + +static struct smp_funcall { + smpfunc_t func; + unsigned long arg1; + unsigned long arg2; + unsigned long arg3; + unsigned long arg4; + unsigned long arg5; + unsigned long processors_in[NR_CPUS]; /* Set when ipi entered. */ + unsigned long processors_out[NR_CPUS]; /* Set when ipi exited. */ +} ccall_info; + +static DEFINE_SPINLOCK(cross_call_lock); + +/* Cross calls must be serialized, at least currently. */ +static void leon_cross_call(smpfunc_t func, cpumask_t mask, unsigned long arg1, + unsigned long arg2, unsigned long arg3, + unsigned long arg4) +{ + if (smp_processors_ready) { + register int high = NR_CPUS - 1; + unsigned long flags; + + spin_lock_irqsave(&cross_call_lock, flags); + + { + /* If you make changes here, make sure gcc generates proper code... */ + register smpfunc_t f asm("i0") = func; + register unsigned long a1 asm("i1") = arg1; + register unsigned long a2 asm("i2") = arg2; + register unsigned long a3 asm("i3") = arg3; + register unsigned long a4 asm("i4") = arg4; + register unsigned long a5 asm("i5") = 0; + + __asm__ __volatile__("std %0, [%6]\n\t" + "std %2, [%6 + 8]\n\t" + "std %4, [%6 + 16]\n\t" : : + "r"(f), "r"(a1), "r"(a2), "r"(a3), + "r"(a4), "r"(a5), + "r"(&ccall_info.func)); + } + + /* Init receive/complete mapping, plus fire the IPI's off. */ + { + register int i; + + cpu_clear(smp_processor_id(), mask); + cpus_and(mask, cpu_online_map, mask); + for (i = 0; i <= high; i++) { + if (cpu_isset(i, mask)) { + ccall_info.processors_in[i] = 0; + ccall_info.processors_out[i] = 0; + set_cpu_int(i, LEON3_IRQ_CROSS_CALL); + + } + } + } + + { + register int i; + + i = 0; + do { + if (!cpu_isset(i, mask)) + continue; + + while (!ccall_info.processors_in[i]) + barrier(); + } while (++i <= high); + + i = 0; + do { + if (!cpu_isset(i, mask)) + continue; + + while (!ccall_info.processors_out[i]) + barrier(); + } while (++i <= high); + } + + spin_unlock_irqrestore(&cross_call_lock, flags); + } +} + +/* Running cross calls. */ +void leon_cross_call_irq(void) +{ + int i = smp_processor_id(); + + ccall_info.processors_in[i] = 1; + ccall_info.func(ccall_info.arg1, ccall_info.arg2, ccall_info.arg3, + ccall_info.arg4, ccall_info.arg5); + ccall_info.processors_out[i] = 1; +} + +void leon_percpu_timer_interrupt(struct pt_regs *regs) +{ + struct pt_regs *old_regs; + int cpu = smp_processor_id(); + + old_regs = set_irq_regs(regs); + + leon_clear_profile_irq(cpu); + + profile_tick(CPU_PROFILING); + + if (!--prof_counter(cpu)) { + int user = user_mode(regs); + + irq_enter(); + update_process_times(user); + irq_exit(); + + prof_counter(cpu) = prof_multiplier(cpu); + } + set_irq_regs(old_regs); +} + +static void __init smp_setup_percpu_timer(void) +{ + int cpu = smp_processor_id(); + + prof_counter(cpu) = prof_multiplier(cpu) = 1; +} + +void __init leon_blackbox_id(unsigned *addr) +{ + int rd = *addr & 0x3e000000; + int rs1 = rd >> 11; + + /* patch places where ___b_hard_smp_processor_id appears */ + addr[0] = 0x81444000 | rd; /* rd %asr17, reg */ + addr[1] = 0x8130201c | rd | rs1; /* srl reg, 0x1c, reg */ + addr[2] = 0x01000000; /* nop */ +} + +void __init leon_blackbox_current(unsigned *addr) +{ + int rd = *addr & 0x3e000000; + int rs1 = rd >> 11; + + /* patch LOAD_CURRENT macro where ___b_load_current appears */ + addr[0] = 0x81444000 | rd; /* rd %asr17, reg */ + addr[2] = 0x8130201c | rd | rs1; /* srl reg, 0x1c, reg */ + addr[4] = 0x81282002 | rd | rs1; /* sll reg, 0x2, reg */ + +} + +/* + * CPU idle callback function + * See .../arch/sparc/kernel/process.c + */ +void pmc_leon_idle(void) +{ + __asm__ volatile ("mov %g0, %asr19"); +} + +void __init leon_init_smp(void) +{ + /* Patch ipi15 trap table */ + t_nmi[1] = t_nmi[1] + (linux_trap_ipi15_leon - linux_trap_ipi15_sun4m); + + BTFIXUPSET_BLACKBOX(hard_smp_processor_id, leon_blackbox_id); + BTFIXUPSET_BLACKBOX(load_current, leon_blackbox_current); + BTFIXUPSET_CALL(smp_cross_call, leon_cross_call, BTFIXUPCALL_NORM); + BTFIXUPSET_CALL(__hard_smp_processor_id, __leon_processor_id, + BTFIXUPCALL_NORM); + +#ifndef PMC_NO_IDLE + /* Assign power management IDLE handler */ + pm_idle = pmc_leon_idle; + printk(KERN_INFO "leon: power management initialized\n"); +#endif + +} + +#endif /* CONFIG_SPARC_LEON */ diff --git a/arch/sparc/kernel/pci_msi.c b/arch/sparc/kernel/pci_msi.c index f1be37a7b12..e1b0541feb1 100644 --- a/arch/sparc/kernel/pci_msi.c +++ b/arch/sparc/kernel/pci_msi.c @@ -112,7 +112,7 @@ static void free_msi(struct pci_pbm_info *pbm, int msi_num) } static struct irq_chip msi_irq = { - .typename = "PCI-MSI", + .name = "PCI-MSI", .mask = mask_msi_irq, .unmask = unmask_msi_irq, .enable = unmask_msi_irq, diff --git a/arch/sparc/kernel/setup_64.c b/arch/sparc/kernel/setup_64.c index 21180339cb0..a2a79e76344 100644 --- a/arch/sparc/kernel/setup_64.c +++ b/arch/sparc/kernel/setup_64.c @@ -46,6 +46,7 @@ #include <asm/setup.h> #include <asm/mmu.h> #include <asm/ns87303.h> +#include <asm/btext.h> #ifdef CONFIG_IP_PNP #include <net/ipconfig.h> @@ -286,7 +287,10 @@ void __init setup_arch(char **cmdline_p) parse_early_param(); boot_flags_init(*cmdline_p); - register_console(&prom_early_console); +#ifdef CONFIG_EARLYFB + if (btext_find_display()) +#endif + register_console(&prom_early_console); if (tlb_type == hypervisor) printk("ARCH: SUN4V\n"); diff --git a/arch/sparc/kernel/smp_32.c b/arch/sparc/kernel/smp_32.c index 132d81fb261..91c10fb7085 100644 --- a/arch/sparc/kernel/smp_32.c +++ b/arch/sparc/kernel/smp_32.c @@ -32,6 +32,7 @@ #include <asm/cacheflush.h> #include <asm/tlbflush.h> #include <asm/cpudata.h> +#include <asm/leon.h> #include "irq.h" @@ -96,6 +97,9 @@ void __init smp_cpus_done(unsigned int max_cpus) case sun4d: smp4d_smp_done(); break; + case sparc_leon: + leon_smp_done(); + break; case sun4e: printk("SUN4E\n"); BUG(); @@ -306,6 +310,9 @@ void __init smp_prepare_cpus(unsigned int max_cpus) case sun4d: smp4d_boot_cpus(); break; + case sparc_leon: + leon_boot_cpus(); + break; case sun4e: printk("SUN4E\n"); BUG(); @@ -376,6 +383,9 @@ int __cpuinit __cpu_up(unsigned int cpu) case sun4d: ret = smp4d_boot_one_cpu(cpu); break; + case sparc_leon: + ret = leon_boot_one_cpu(cpu); + break; case sun4e: printk("SUN4E\n"); BUG(); diff --git a/arch/sparc/kernel/sys_sparc32.c b/arch/sparc/kernel/sys_sparc32.c index f862372074b..00abe87e5b5 100644 --- a/arch/sparc/kernel/sys_sparc32.c +++ b/arch/sparc/kernel/sys_sparc32.c @@ -26,11 +26,6 @@ #include <linux/nfs_fs.h> #include <linux/quota.h> #include <linux/module.h> -#include <linux/sunrpc/svc.h> -#include <linux/nfsd/nfsd.h> -#include <linux/nfsd/cache.h> -#include <linux/nfsd/xdr.h> -#include <linux/nfsd/syscall.h> #include <linux/poll.h> #include <linux/personality.h> #include <linux/stat.h> diff --git a/arch/sparc/kernel/time_32.c b/arch/sparc/kernel/time_32.c index 614ac7b4a9d..5b2f595fe65 100644 --- a/arch/sparc/kernel/time_32.c +++ b/arch/sparc/kernel/time_32.c @@ -210,9 +210,6 @@ static void __init sbus_time_init(void) btfixup(); sparc_init_timers(timer_interrupt); - - /* Now that OBP ticker has been silenced, it is safe to enable IRQ. */ - local_irq_enable(); } void __init time_init(void) diff --git a/arch/sparc/kernel/trampoline_32.S b/arch/sparc/kernel/trampoline_32.S index 5e235c52d66..691f484e03b 100644 --- a/arch/sparc/kernel/trampoline_32.S +++ b/arch/sparc/kernel/trampoline_32.S @@ -15,7 +15,7 @@ #include <asm/contregs.h> #include <asm/thread_info.h> - .globl sun4m_cpu_startup, __smp4m_processor_id + .globl sun4m_cpu_startup, __smp4m_processor_id, __leon_processor_id .globl sun4d_cpu_startup, __smp4d_processor_id __CPUINIT @@ -106,6 +106,12 @@ __smp4d_processor_id: retl mov %g1, %o7 +__leon_processor_id: + rd %asr17,%g2 + srl %g2,28,%g2 + retl + mov %g1, %o7 + /* CPUID in bootbus can be found at PA 0xff0140000 */ #define SUN4D_BOOTBUS_CPUID 0xf0140000 @@ -160,3 +166,64 @@ sun4d_cpu_startup: nop b,a smp_do_cpu_idle + +#ifdef CONFIG_SPARC_LEON + + __CPUINIT + .align 4 + .global leon_smp_cpu_startup, smp_penguin_ctable + +leon_smp_cpu_startup: + + set smp_penguin_ctable,%g1 + ld [%g1+4],%g1 + srl %g1,4,%g1 + set 0x00000100,%g5 /* SRMMU_CTXTBL_PTR */ + sta %g1, [%g5] ASI_M_MMUREGS + + /* Set up a sane %psr -- PIL<0xf> S<0x1> PS<0x1> CWP<0x0> */ + set (PSR_PIL | PSR_S | PSR_PS), %g1 + wr %g1, 0x0, %psr ! traps off though + WRITE_PAUSE + + /* Our %wim is one behind CWP */ + mov 2, %g1 + wr %g1, 0x0, %wim + WRITE_PAUSE + + /* Set tbr - we use just one trap table. */ + set trapbase, %g1 + wr %g1, 0x0, %tbr + WRITE_PAUSE + + /* Get our CPU id */ + rd %asr17,%g3 + + /* Give ourselves a stack and curptr. */ + set current_set, %g5 + srl %g3, 28, %g4 + sll %g4, 2, %g4 + ld [%g5 + %g4], %g6 + + sethi %hi(THREAD_SIZE - STACKFRAME_SZ), %sp + or %sp, %lo(THREAD_SIZE - STACKFRAME_SZ), %sp + add %g6, %sp, %sp + + /* Turn on traps (PSR_ET). */ + rd %psr, %g1 + wr %g1, PSR_ET, %psr ! traps on + WRITE_PAUSE + + /* Init our caches, etc. */ + set poke_srmmu, %g5 + ld [%g5], %g5 + call %g5 + nop + + /* Start this processor. */ + call leon_callin + nop + + b,a smp_do_cpu_idle + +#endif diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c index 509b1ffeba6..367321a030d 100644 --- a/arch/sparc/mm/srmmu.c +++ b/arch/sparc/mm/srmmu.c @@ -1990,7 +1990,7 @@ void __init poke_leonsparc(void) void __init init_leon(void) { - srmmu_name = "Leon"; + srmmu_name = "LEON"; BTFIXUPSET_CALL(flush_cache_all, leon_flush_cache_all, BTFIXUPCALL_NORM); @@ -2037,8 +2037,6 @@ static void __init get_srmmu_type(void) /* First, check for sparc-leon. */ if (sparc_cpu_model == sparc_leon) { - psr_typ = 0xf; /* hardcoded ids for older models/simulators */ - psr_vers = 2; init_leon(); return; } @@ -2301,7 +2299,8 @@ void __init ld_mmu_srmmu(void) BTFIXUPSET_CALL(flush_cache_mm, smp_flush_cache_mm, BTFIXUPCALL_NORM); BTFIXUPSET_CALL(flush_cache_range, smp_flush_cache_range, BTFIXUPCALL_NORM); BTFIXUPSET_CALL(flush_cache_page, smp_flush_cache_page, BTFIXUPCALL_NORM); - if (sparc_cpu_model != sun4d) { + if (sparc_cpu_model != sun4d && + sparc_cpu_model != sparc_leon) { BTFIXUPSET_CALL(flush_tlb_all, smp_flush_tlb_all, BTFIXUPCALL_NORM); BTFIXUPSET_CALL(flush_tlb_mm, smp_flush_tlb_mm, BTFIXUPCALL_NORM); BTFIXUPSET_CALL(flush_tlb_range, smp_flush_tlb_range, BTFIXUPCALL_NORM); @@ -2330,6 +2329,8 @@ void __init ld_mmu_srmmu(void) #ifdef CONFIG_SMP if (sparc_cpu_model == sun4d) sun4d_init_smp(); + else if (sparc_cpu_model == sparc_leon) + leon_init_smp(); else sun4m_init_smp(); #endif diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index e5225725727..50943ff78f4 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -1477,4 +1477,17 @@ config SERIAL_BCM63XX_CONSOLE If you have enabled the serial port on the bcm63xx CPU you can make it the console by answering Y to this option. +config SERIAL_GRLIB_GAISLER_APBUART + tristate "GRLIB APBUART serial support" + depends on OF + ---help--- + Add support for the GRLIB APBUART serial port. + +config SERIAL_GRLIB_GAISLER_APBUART_CONSOLE + bool "Console on GRLIB APBUART serial port" + depends on SERIAL_GRLIB_GAISLER_APBUART=y + select SERIAL_CORE_CONSOLE + help + Support for running a console on the GRLIB APBUART + endmenu diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index d21d5dd5d04..5548fe7df61 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -81,3 +81,4 @@ obj-$(CONFIG_SERIAL_KS8695) += serial_ks8695.o obj-$(CONFIG_KGDB_SERIAL_CONSOLE) += kgdboc.o obj-$(CONFIG_SERIAL_QE) += ucc_uart.o obj-$(CONFIG_SERIAL_TIMBERDALE) += timbuart.o +obj-$(CONFIG_SERIAL_GRLIB_GAISLER_APBUART) += apbuart.o diff --git a/drivers/serial/apbuart.c b/drivers/serial/apbuart.c new file mode 100644 index 00000000000..fe91319b5f6 --- /dev/null +++ b/drivers/serial/apbuart.c @@ -0,0 +1,710 @@ +/* + * Driver for GRLIB serial ports (APBUART) + * + * Based on linux/drivers/serial/amba.c + * + * Copyright (C) 2000 Deep Blue Solutions Ltd. + * Copyright (C) 2003 Konrad Eisele <eiselekd@web.de> + * Copyright (C) 2006 Daniel Hellstrom <daniel@gaisler.com>, Aeroflex Gaisler AB + * Copyright (C) 2008 Gilead Kutnick <kutnickg@zin-tech.com> + * Copyright (C) 2009 Kristoffer Glembo <kristoffer@gaisler.com>, Aeroflex Gaisler AB + */ + +#if defined(CONFIG_SERIAL_GRLIB_GAISLER_APBUART_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) +#define SUPPORT_SYSRQ +#endif + +#include <linux/module.h> +#include <linux/tty.h> +#include <linux/ioport.h> +#include <linux/init.h> +#include <linux/serial.h> +#include <linux/console.h> +#include <linux/sysrq.h> +#include <linux/kthread.h> +#include <linux/device.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/serial_core.h> +#include <asm/irq.h> + +#include "apbuart.h" + +#define SERIAL_APBUART_MAJOR TTY_MAJOR +#define SERIAL_APBUART_MINOR 64 +#define UART_DUMMY_RSR_RX 0x8000 /* for ignore all read */ + +static void apbuart_tx_chars(struct uart_port *port); + +static void apbuart_stop_tx(struct uart_port *port) +{ + unsigned int cr; + + cr = UART_GET_CTRL(port); + cr &= ~UART_CTRL_TI; + UART_PUT_CTRL(port, cr); +} + +static void apbuart_start_tx(struct uart_port *port) +{ + unsigned int cr; + + cr = UART_GET_CTRL(port); + cr |= UART_CTRL_TI; + UART_PUT_CTRL(port, cr); + + if (UART_GET_STATUS(port) & UART_STATUS_THE) + apbuart_tx_chars(port); +} + +static void apbuart_stop_rx(struct uart_port *port) +{ + unsigned int cr; + + cr = UART_GET_CTRL(port); + cr &= ~(UART_CTRL_RI); + UART_PUT_CTRL(port, cr); +} + +static void apbuart_enable_ms(struct uart_port *port) +{ + /* No modem status change interrupts for APBUART */ +} + +static void apbuart_rx_chars(struct uart_port *port) +{ + struct tty_struct *tty = port->state->port.tty; + unsigned int status, ch, rsr, flag; + unsigned int max_chars = port->fifosize; + + status = UART_GET_STATUS(port); + + while (UART_RX_DATA(status) && (max_chars--)) { + + ch = UART_GET_CHAR(port); + flag = TTY_NORMAL; + + port->icount.rx++; + + rsr = UART_GET_STATUS(port) | UART_DUMMY_RSR_RX; + UART_PUT_STATUS(port, 0); + if (rsr & UART_STATUS_ERR) { + + if (rsr & UART_STATUS_BR) { + rsr &= ~(UART_STATUS_FE | UART_STATUS_PE); + port->icount.brk++; + if (uart_handle_break(port)) + goto ignore_char; + } else if (rsr & UART_STATUS_PE) { + port->icount.parity++; + } else if (rsr & UART_STATUS_FE) { + port->icount.frame++; + } + if (rsr & UART_STATUS_OE) + port->icount.overrun++; + + rsr &= port->read_status_mask; + + if (rsr & UART_STATUS_PE) + flag = TTY_PARITY; + else if (rsr & UART_STATUS_FE) + flag = TTY_FRAME; + } + + if (uart_handle_sysrq_char(port, ch)) + goto ignore_char; + + uart_insert_char(port, rsr, UART_STATUS_OE, ch, flag); + + + ignore_char: + status = UART_GET_STATUS(port); + } + + tty_flip_buffer_push(tty); +} + +static void apbuart_tx_chars(struct uart_port *port) +{ + struct circ_buf *xmit = &port->state->xmit; + int count; + + if (port->x_char) { + UART_PUT_CHAR(port, port->x_char); + port->icount.tx++; + port->x_char = 0; + return; + } + + if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { + apbuart_stop_tx(port); + return; + } + + /* amba: fill FIFO */ + count = port->fifosize >> 1; + do { + UART_PUT_CHAR(port, xmit->buf[xmit->tail]); + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); + port->icount.tx++; + if (uart_circ_empty(xmit)) + break; + } while (--count > 0); + + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(port); + + if (uart_circ_empty(xmit)) + apbuart_stop_tx(port); +} + +static irqreturn_t apbuart_int(int irq, void *dev_id) +{ + struct uart_port *port = dev_id; + unsigned int status; + + spin_lock(&port->lock); + + status = UART_GET_STATUS(port); + if (status & UART_STATUS_DR) + apbuart_rx_chars(port); + if (status & UART_STATUS_THE) + apbuart_tx_chars(port); + + spin_unlock(&port->lock); + + return IRQ_HANDLED; +} + +static unsigned int apbuart_tx_empty(struct uart_port *port) +{ + unsigned int status = UART_GET_STATUS(port); + return status & UART_STATUS_THE ? TIOCSER_TEMT : 0; +} + +static unsigned int apbuart_get_mctrl(struct uart_port *port) +{ + /* The GRLIB APBUART handles flow control in hardware */ + return TIOCM_CAR | TIOCM_DSR | TIOCM_CTS; +} + +static void apbuart_set_mctrl(struct uart_port *port, unsigned int mctrl) +{ + /* The GRLIB APBUART handles flow control in hardware */ +} + +static void apbuart_break_ctl(struct uart_port *port, int break_state) +{ + /* We don't support sending break */ +} + +static int apbuart_startup(struct uart_port *port) +{ + int retval; + unsigned int cr; + + /* Allocate the IRQ */ + retval = request_irq(port->irq, apbuart_int, 0, "apbuart", port); + if (retval) + return retval; + + /* Finally, enable interrupts */ + cr = UART_GET_CTRL(port); + UART_PUT_CTRL(port, + cr | UART_CTRL_RE | UART_CTRL_TE | + UART_CTRL_RI | UART_CTRL_TI); + + return 0; +} + +static void apbuart_shutdown(struct uart_port *port) +{ + unsigned int cr; + + /* disable all interrupts, disable the port */ + cr = UART_GET_CTRL(port); + UART_PUT_CTRL(port, + cr & ~(UART_CTRL_RE | UART_CTRL_TE | + UART_CTRL_RI | UART_CTRL_TI)); + + /* Free the interrupt */ + free_irq(port->irq, port); +} + +static void apbuart_set_termios(struct uart_port *port, + struct ktermios *termios, struct ktermios *old) +{ + unsigned int cr; + unsigned long flags; + unsigned int baud, quot; + + /* Ask the core to calculate the divisor for us. */ + baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16); + if (baud == 0) + panic("invalid baudrate %i\n", port->uartclk / 16); + + /* uart_get_divisor calc a *16 uart freq, apbuart is *8 */ + quot = (uart_get_divisor(port, baud)) * 2; + cr = UART_GET_CTRL(port); + cr &= ~(UART_CTRL_PE | UART_CTRL_PS); + + if (termios->c_cflag & PARENB) { + cr |= UART_CTRL_PE; + if ((termios->c_cflag & PARODD)) + cr |= UART_CTRL_PS; + } + + /* Enable flow control. */ + if (termios->c_cflag & CRTSCTS) + cr |= UART_CTRL_FL; + + spin_lock_irqsave(&port->lock, flags); + + /* Update the per-port timeout. */ + uart_update_timeout(port, termios->c_cflag, baud); + + port->read_status_mask = UART_STATUS_OE; + if (termios->c_iflag & INPCK) + port->read_status_mask |= UART_STATUS_FE | UART_STATUS_PE; + + /* Characters to ignore */ + port->ignore_status_mask = 0; + if (termios->c_iflag & IGNPAR) + port->ignore_status_mask |= UART_STATUS_FE | UART_STATUS_PE; + + /* Ignore all characters if CREAD is not set. */ + if ((termios->c_cflag & CREAD) == 0) + port->ignore_status_mask |= UART_DUMMY_RSR_RX; + + /* Set baud rate */ + quot -= 1; + UART_PUT_SCAL(port, quot); + UART_PUT_CTRL(port, cr); + + spin_unlock_irqrestore(&port->lock, flags); +} + +static const char *apbuart_type(struct uart_port *port) +{ + return port->type == PORT_APBUART ? "GRLIB/APBUART" : NULL; +} + +static void apbuart_release_port(struct uart_port *port) +{ + release_mem_region(port->mapbase, 0x100); +} + +static int apbuart_request_port(struct uart_port *port) +{ + return request_mem_region(port->mapbase, 0x100, "grlib-apbuart") + != NULL ? 0 : -EBUSY; + return 0; +} + +/* Configure/autoconfigure the port */ +static void apbuart_config_port(struct uart_port *port, int flags) +{ + if (flags & UART_CONFIG_TYPE) { + port->type = PORT_APBUART; + apbuart_request_port(port); + } +} + +/* Verify the new serial_struct (for TIOCSSERIAL) */ +static int apbuart_verify_port(struct uart_port *port, + struct serial_struct *ser) +{ + int ret = 0; + if (ser->type != PORT_UNKNOWN && ser->type != PORT_APBUART) + ret = -EINVAL; + if (ser->irq < 0 || ser->irq >= NR_IRQS) + ret = -EINVAL; + if (ser->baud_base < 9600) + ret = -EINVAL; + return ret; +} + +static struct uart_ops grlib_apbuart_ops = { + .tx_empty = apbuart_tx_empty, + .set_mctrl = apbuart_set_mctrl, + .get_mctrl = apbuart_get_mctrl, + .stop_tx = apbuart_stop_tx, + .start_tx = apbuart_start_tx, + .stop_rx = apbuart_stop_rx, + .enable_ms = apbuart_enable_ms, + .break_ctl = apbuart_break_ctl, + .startup = apbuart_startup, + .shutdown = apbuart_shutdown, + .set_termios = apbuart_set_termios, + .type = apbuart_type, + .release_port = apbuart_release_port, + .request_port = apbuart_request_port, + .config_port = apbuart_config_port, + .verify_port = apbuart_verify_port, +}; + +static struct uart_port grlib_apbuart_ports[UART_NR]; +static struct device_node *grlib_apbuart_nodes[UART_NR]; + +static int apbuart_scan_fifo_size(struct uart_port *port, int portnumber) +{ + int ctrl, loop = 0; + int status; + int fifosize; + unsigned long flags; + + ctrl = UART_GET_CTRL(port); + + /* + * Enable the transceiver and wait for it to be ready to send data. + * Clear interrupts so that this process will not be externally + * interrupted in the middle (which can cause the transceiver to + * drain prematurely). + */ + + local_irq_save(flags); + + UART_PUT_CTRL(port, ctrl | UART_CTRL_TE); + + while (!UART_TX_READY(UART_GET_STATUS(port))) + loop++; + + /* + * Disable the transceiver so data isn't actually sent during the + * actual test. + */ + + UART_PUT_CTRL(port, ctrl & ~(UART_CTRL_TE)); + + fifosize = 1; + UART_PUT_CHAR(port, 0); + + /* + * So long as transmitting a character increments the tranceivier FIFO + * length the FIFO must be at least that big. These bytes will + * automatically drain off of the FIFO. + */ + + status = UART_GET_STATUS(port); + while (((status >> 20) & 0x3F) == fifosize) { + fifosize++; + UART_PUT_CHAR(port, 0); + status = UART_GET_STATUS(port); + } + + fifosize--; + + UART_PUT_CTRL(port, ctrl); + local_irq_restore(flags); + + if (fifosize == 0) + fifosize = 1; + + return fifosize; +} + +static void apbuart_flush_fifo(struct uart_port *port) +{ + int i; + + for (i = 0; i < port->fifosize; i++) + UART_GET_CHAR(port); +} + + +/* ======================================================================== */ +/* Console driver, if enabled */ +/* ======================================================================== */ + +#ifdef CONFIG_SERIAL_GRLIB_GAISLER_APBUART_CONSOLE + +static void apbuart_console_putchar(struct uart_port *port, int ch) +{ + unsigned int status; + do { + status = UART_GET_STATUS(port); + } while (!UART_TX_READY(status)); + UART_PUT_CHAR(port, ch); +} + +static void +apbuart_console_write(struct console *co, const char *s, unsigned int count) +{ + struct uart_port *port = &grlib_apbuart_ports[co->index]; + unsigned int status, old_cr, new_cr; + + /* First save the CR then disable the interrupts */ + old_cr = UART_GET_CTRL(port); + new_cr = old_cr & ~(UART_CTRL_RI | UART_CTRL_TI); + UART_PUT_CTRL(port, new_cr); + + uart_console_write(port, s, count, apbuart_console_putchar); + + /* + * Finally, wait for transmitter to become empty + * and restore the TCR + */ + do { + status = UART_GET_STATUS(port); + } while (!UART_TX_READY(status)); + UART_PUT_CTRL(port, old_cr); +} + +static void __init +apbuart_console_get_options(struct uart_port *port, int *baud, + int *parity, int *bits) +{ + if (UART_GET_CTRL(port) & (UART_CTRL_RE | UART_CTRL_TE)) { + + unsigned int quot, status; + status = UART_GET_STATUS(port); + + *parity = 'n'; + if (status & UART_CTRL_PE) { + if ((status & UART_CTRL_PS) == 0) + *parity = 'e'; + else + *parity = 'o'; + } + + *bits = 8; + quot = UART_GET_SCAL(port) / 8; + *baud = port->uartclk / (16 * (quot + 1)); + } +} + +static int __init apbuart_console_setup(struct console *co, char *options) +{ + struct uart_port *port; + int baud = 38400; + int bits = 8; + int parity = 'n'; + int flow = 'n'; + + pr_debug("apbuart_console_setup co=%p, co->index=%i, options=%s\n", + co, co->index, options); + + /* + * Check whether an invalid uart number has been specified, and + * if so, search for the first available port that does have + * console support. + */ + if (co->index >= grlib_apbuart_port_nr) + co->index = 0; + + port = &grlib_apbuart_ports[co->index]; + + spin_lock_init(&port->lock); + + if (options) + uart_parse_options(options, &baud, &parity, &bits, &flow); + else + apbuart_console_get_options(port, &baud, &parity, &bits); + + return uart_set_options(port, co, baud, parity, bits, flow); +} + +static struct uart_driver grlib_apbuart_driver; + +static struct console grlib_apbuart_console = { + .name = "ttyS", + .write = apbuart_console_write, + .device = uart_console_device, + .setup = apbuart_console_setup, + .flags = CON_PRINTBUFFER, + .index = -1, + .data = &grlib_apbuart_driver, +}; + + +static void grlib_apbuart_configure(void); + +static int __init apbuart_console_init(void) +{ + grlib_apbuart_configure(); + register_console(&grlib_apbuart_console); + return 0; +} + +console_initcall(apbuart_console_init); + +#define APBUART_CONSOLE (&grlib_apbuart_console) +#else +#define APBUART_CONSOLE NULL +#endif + +static struct uart_driver grlib_apbuart_driver = { + .owner = THIS_MODULE, + .driver_name = "serial", + .dev_name = "ttyS", + .major = SERIAL_APBUART_MAJOR, + .minor = SERIAL_APBUART_MINOR, + .nr = UART_NR, + .cons = APBUART_CONSOLE, +}; + + +/* ======================================================================== */ +/* OF Platform Driver */ +/* ======================================================================== */ + +static int __devinit apbuart_probe(struct of_device *op, + const struct of_device_id *match) +{ + int i = -1; + struct uart_port *port = NULL; + + i = 0; + for (i = 0; i < grlib_apbuart_port_nr; i++) { + if (op->node == grlib_apbuart_nodes[i]) + break; + } + + port = &grlib_apbuart_ports[i]; + port->dev = &op->dev; + + uart_add_one_port(&grlib_apbuart_driver, (struct uart_port *) port); + + apbuart_flush_fifo((struct uart_port *) port); + + printk(KERN_INFO "grlib-apbuart at 0x%llx, irq %d\n", + (unsigned long long) port->mapbase, port->irq); + return 0; + +} + +static struct of_device_id __initdata apbuart_match[] = { + { + .name = "GAISLER_APBUART", + }, + {}, +}; + +static struct of_platform_driver grlib_apbuart_of_driver = { + .match_table = apbuart_match, + .probe = apbuart_probe, + .driver = { + .owner = THIS_MODULE, + .name = "grlib-apbuart", + }, +}; + + +static void grlib_apbuart_configure(void) +{ + static int enum_done; + struct device_node *np, *rp; + struct uart_port *port = NULL; + const u32 *prop; + int freq_khz; + int v = 0, d = 0; + unsigned int addr; + int irq, line; + struct amba_prom_registers *regs; + + if (enum_done) + return; + + /* Get bus frequency */ + rp = of_find_node_by_path("/"); + rp = of_get_next_child(rp, NULL); + prop = of_get_property(rp, "clock-frequency", NULL); + freq_khz = *prop; + + line = 0; + for_each_matching_node(np, apbuart_match) { + + int *vendor = (int *) of_get_property(np, "vendor", NULL); + int *device = (int *) of_get_property(np, "device", NULL); + int *irqs = (int *) of_get_property(np, "interrupts", NULL); + regs = (struct amba_prom_registers *) + of_get_property(np, "reg", NULL); + + if (vendor) + v = *vendor; + if (device) + d = *device; + + if (!irqs || !regs) + return; + + grlib_apbuart_nodes[line] = np; + + addr = regs->phys_addr; + irq = *irqs; + + port = &grlib_apbuart_ports[line]; + + port->mapbase = addr; + port->membase = ioremap(addr, sizeof(struct grlib_apbuart_regs_map)); + port->irq = irq; + port->iotype = UPIO_MEM; + port->ops = &grlib_apbuart_ops; + port->flags = UPF_BOOT_AUTOCONF; + port->line = line; + port->uartclk = freq_khz * 1000; + port->fifosize = apbuart_scan_fifo_size((struct uart_port *) port, line); + line++; + + /* We support maximum UART_NR uarts ... */ + if (line == UART_NR) + break; + + } + + enum_done = 1; + + grlib_apbuart_driver.nr = grlib_apbuart_port_nr = line; +} + +static int __init grlib_apbuart_init(void) +{ + int ret; + + /* Find all APBUARTS in device the tree and initialize their ports */ + grlib_apbuart_configure(); + + printk(KERN_INFO "Serial: GRLIB APBUART driver\n"); + + ret = uart_register_driver(&grlib_apbuart_driver); + + if (ret) { + printk(KERN_ERR "%s: uart_register_driver failed (%i)\n", + __FILE__, ret); + return ret; + } + + ret = of_register_platform_driver(&grlib_apbuart_of_driver); + if (ret) { + printk(KERN_ERR + "%s: of_register_platform_driver failed (%i)\n", + __FILE__, ret); + uart_unregister_driver(&grlib_apbuart_driver); + return ret; + } + + return ret; +} + +static void __exit grlib_apbuart_exit(void) +{ + int i; + + for (i = 0; i < grlib_apbuart_port_nr; i++) + uart_remove_one_port(&grlib_apbuart_driver, + &grlib_apbuart_ports[i]); + + uart_unregister_driver(&grlib_apbuart_driver); + of_unregister_platform_driver(&grlib_apbuart_of_driver); +} + +module_init(grlib_apbuart_init); +module_exit(grlib_apbuart_exit); + +MODULE_AUTHOR("Aeroflex Gaisler AB"); +MODULE_DESCRIPTION("GRLIB APBUART serial driver"); +MODULE_VERSION("2.1"); +MODULE_LICENSE("GPL"); diff --git a/drivers/serial/apbuart.h b/drivers/serial/apbuart.h new file mode 100644 index 00000000000..5faf87c8d2b --- /dev/null +++ b/drivers/serial/apbuart.h @@ -0,0 +1,64 @@ +#ifndef __GRLIB_APBUART_H__ +#define __GRLIB_APBUART_H__ + +#include <asm/io.h> + +#define UART_NR 8 +static int grlib_apbuart_port_nr; + +struct grlib_apbuart_regs_map { + u32 data; + u32 status; + u32 ctrl; + u32 scaler; +}; + +struct amba_prom_registers { + unsigned int phys_addr; + unsigned int reg_size; +}; + +/* + * The following defines the bits in the APBUART Status Registers. + */ +#define UART_STATUS_DR 0x00000001 /* Data Ready */ +#define UART_STATUS_TSE 0x00000002 /* TX Send Register Empty */ +#define UART_STATUS_THE 0x00000004 /* TX Hold Register Empty */ +#define UART_STATUS_BR 0x00000008 /* Break Error */ +#define UART_STATUS_OE 0x00000010 /* RX Overrun Error */ +#define UART_STATUS_PE 0x00000020 /* RX Parity Error */ +#define UART_STATUS_FE 0x00000040 /* RX Framing Error */ +#define UART_STATUS_ERR 0x00000078 /* Error Mask */ + +/* + * The following defines the bits in the APBUART Ctrl Registers. + */ +#define UART_CTRL_RE 0x00000001 /* Receiver enable */ +#define UART_CTRL_TE 0x00000002 /* Transmitter enable */ +#define UART_CTRL_RI 0x00000004 /* Receiver interrupt enable */ +#define UART_CTRL_TI 0x00000008 /* Transmitter irq */ +#define UART_CTRL_PS 0x00000010 /* Parity select */ +#define UART_CTRL_PE 0x00000020 /* Parity enable */ +#define UART_CTRL_FL 0x00000040 /* Flow control enable */ +#define UART_CTRL_LB 0x00000080 /* Loopback enable */ + +#define APBBASE(port) ((struct grlib_apbuart_regs_map *)((port)->membase)) + +#define APBBASE_DATA_P(port) (&(APBBASE(port)->data)) +#define APBBASE_STATUS_P(port) (&(APBBASE(port)->status)) +#define APBBASE_CTRL_P(port) (&(APBBASE(port)->ctrl)) +#define APBBASE_SCALAR_P(port) (&(APBBASE(port)->scaler)) + +#define UART_GET_CHAR(port) (__raw_readl(APBBASE_DATA_P(port))) +#define UART_PUT_CHAR(port, v) (__raw_writel(v, APBBASE_DATA_P(port))) +#define UART_GET_STATUS(port) (__raw_readl(APBBASE_STATUS_P(port))) +#define UART_PUT_STATUS(port, v)(__raw_writel(v, APBBASE_STATUS_P(port))) +#define UART_GET_CTRL(port) (__raw_readl(APBBASE_CTRL_P(port))) +#define UART_PUT_CTRL(port, v) (__raw_writel(v, APBBASE_CTRL_P(port))) +#define UART_GET_SCAL(port) (__raw_readl(APBBASE_SCALAR_P(port))) +#define UART_PUT_SCAL(port, v) (__raw_writel(v, APBBASE_SCALAR_P(port))) + +#define UART_RX_DATA(s) (((s) & UART_STATUS_DR) != 0) +#define UART_TX_READY(s) (((s) & UART_STATUS_THE) != 0) + +#endif /* __GRLIB_APBUART_H__ */ diff --git a/drivers/watchdog/riowd.c b/drivers/watchdog/riowd.c index d3c824dc235..c14ae867690 100644 --- a/drivers/watchdog/riowd.c +++ b/drivers/watchdog/riowd.c @@ -10,7 +10,6 @@ #include <linux/errno.h> #include <linux/init.h> #include <linux/miscdevice.h> -#include <linux/smp_lock.h> #include <linux/watchdog.h> #include <linux/of.h> #include <linux/of_device.h> @@ -75,7 +74,6 @@ static void riowd_writereg(struct riowd *p, u8 val, int index) static int riowd_open(struct inode *inode, struct file *filp) { - cycle_kernel_lock(); nonseekable_open(inode, filp); return 0; } @@ -194,6 +192,8 @@ static int __devinit riowd_probe(struct of_device *op, printk(KERN_ERR PFX "Cannot map registers.\n"); goto out_free; } + /* Make miscdev useable right away */ + riowd_device = p; err = misc_register(&riowd_miscdev); if (err) { @@ -205,10 +205,10 @@ static int __devinit riowd_probe(struct of_device *op, "regs at %p\n", riowd_timeout, p->regs); dev_set_drvdata(&op->dev, p); - riowd_device = p; return 0; out_iounmap: + riowd_device = NULL; of_iounmap(&op->resource[0], p->regs, 2); out_free: diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index db532ce288b..8c3dd36fe91 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -179,6 +179,9 @@ /* BCM63xx family SoCs */ #define PORT_BCM63XX 89 +/* Aeroflex Gaisler GRLIB APBUART */ +#define PORT_APBUART 90 + #ifdef __KERNEL__ #include <linux/compiler.h> |