diff options
| -rw-r--r-- | arch/h8300/kernel/asm-offsets.c | 67 | ||||
| -rw-r--r-- | arch/h8300/kernel/dma.c | 69 | ||||
| -rw-r--r-- | arch/h8300/kernel/h8300_ksyms.c | 36 | ||||
| -rw-r--r-- | arch/h8300/kernel/module.c | 70 | ||||
| -rw-r--r-- | arch/h8300/kernel/sim-console.c | 79 | ||||
| -rw-r--r-- | arch/h8300/kernel/syscalls.c | 14 |
6 files changed, 335 insertions, 0 deletions
diff --git a/arch/h8300/kernel/asm-offsets.c b/arch/h8300/kernel/asm-offsets.c new file mode 100644 index 000000000000..dc2d16ce8a0d --- /dev/null +++ b/arch/h8300/kernel/asm-offsets.c @@ -0,0 +1,67 @@ +/* + * This program is used to generate definitions needed by + * assembly language modules. + * + * We use the technique used in the OSF Mach kernel code: + * generate asm statements containing #defines, + * compile this file to assembler, and then extract the + * #defines from the assembly-language output. + */ + +#include <linux/stddef.h> +#include <linux/sched.h> +#include <linux/kernel_stat.h> +#include <linux/ptrace.h> +#include <linux/hardirq.h> +#include <linux/kbuild.h> +#include <asm/irq.h> +#include <asm/ptrace.h> + +int main(void) +{ + /* offsets into the task struct */ + OFFSET(TASK_STATE, task_struct, state); + OFFSET(TASK_FLAGS, task_struct, flags); + OFFSET(TASK_PTRACE, task_struct, ptrace); + OFFSET(TASK_BLOCKED, task_struct, blocked); + OFFSET(TASK_THREAD, task_struct, thread); + OFFSET(TASK_THREAD_INFO, task_struct, stack); + OFFSET(TASK_MM, task_struct, mm); + OFFSET(TASK_ACTIVE_MM, task_struct, active_mm); + + /* offsets into the irq_cpustat_t struct */ + DEFINE(CPUSTAT_SOFTIRQ_PENDING, offsetof(irq_cpustat_t, + __softirq_pending)); + + /* offsets into the thread struct */ + OFFSET(THREAD_KSP, thread_struct, ksp); + OFFSET(THREAD_USP, thread_struct, usp); + OFFSET(THREAD_CCR, thread_struct, ccr); + + /* offsets into the pt_regs struct */ + DEFINE(LER0, offsetof(struct pt_regs, er0) - sizeof(long)); + DEFINE(LER1, offsetof(struct pt_regs, er1) - sizeof(long)); + DEFINE(LER2, offsetof(struct pt_regs, er2) - sizeof(long)); + DEFINE(LER3, offsetof(struct pt_regs, er3) - sizeof(long)); + DEFINE(LER4, offsetof(struct pt_regs, er4) - sizeof(long)); + DEFINE(LER5, offsetof(struct pt_regs, er5) - sizeof(long)); + DEFINE(LER6, offsetof(struct pt_regs, er6) - sizeof(long)); + DEFINE(LORIG, offsetof(struct pt_regs, orig_er0) - sizeof(long)); + DEFINE(LSP, offsetof(struct pt_regs, sp) - sizeof(long)); + DEFINE(LCCR, offsetof(struct pt_regs, ccr) - sizeof(long)); + DEFINE(LVEC, offsetof(struct pt_regs, vector) - sizeof(long)); +#if defined(CONFIG_CPU_H8S) + DEFINE(LEXR, offsetof(struct pt_regs, exr) - sizeof(long)); +#endif + DEFINE(LRET, offsetof(struct pt_regs, pc) - sizeof(long)); + + DEFINE(PT_PTRACED, PT_PTRACED); + + /* offsets in thread_info structure */ + OFFSET(TI_TASK, thread_info, task); + OFFSET(TI_FLAGS, thread_info, flags); + OFFSET(TI_CPU, thread_info, cpu); + OFFSET(TI_PRE, thread_info, preempt_count); + + return 0; +} diff --git a/arch/h8300/kernel/dma.c b/arch/h8300/kernel/dma.c new file mode 100644 index 000000000000..eeb13d3f2424 --- /dev/null +++ b/arch/h8300/kernel/dma.c @@ -0,0 +1,69 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +#include <linux/dma-mapping.h> +#include <linux/kernel.h> +#include <linux/scatterlist.h> +#include <linux/module.h> +#include <asm/pgalloc.h> + +static void *dma_alloc(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp, + struct dma_attrs *attrs) +{ + void *ret; + + /* ignore region specifiers */ + gfp &= ~(__GFP_DMA | __GFP_HIGHMEM); + + if (dev == NULL || (*dev->dma_mask < 0xffffffff)) + gfp |= GFP_DMA; + ret = (void *)__get_free_pages(gfp, get_order(size)); + + if (ret != NULL) { + memset(ret, 0, size); + *dma_handle = virt_to_phys(ret); + } + return ret; +} + +static void dma_free(struct device *dev, size_t size, + void *vaddr, dma_addr_t dma_handle, + struct dma_attrs *attrs) + +{ + free_pages((unsigned long)vaddr, get_order(size)); +} + +static dma_addr_t map_page(struct device *dev, struct page *page, + unsigned long offset, size_t size, + enum dma_data_direction direction, + struct dma_attrs *attrs) +{ + return page_to_phys(page) + offset; +} + +static int map_sg(struct device *dev, struct scatterlist *sgl, + int nents, enum dma_data_direction direction, + struct dma_attrs *attrs) +{ + struct scatterlist *sg; + int i; + + for_each_sg(sgl, sg, nents, i) { + sg->dma_address = sg_phys(sg); + } + + return nents; +} + +struct dma_map_ops h8300_dma_map_ops = { + .alloc = dma_alloc, + .free = dma_free, + .map_page = map_page, + .map_sg = map_sg, +}; +EXPORT_SYMBOL(h8300_dma_map_ops); diff --git a/arch/h8300/kernel/h8300_ksyms.c b/arch/h8300/kernel/h8300_ksyms.c new file mode 100644 index 000000000000..a9033c838968 --- /dev/null +++ b/arch/h8300/kernel/h8300_ksyms.c @@ -0,0 +1,36 @@ +#include <linux/module.h> +#include <linux/linkage.h> + +/* + * libgcc functions - functions that are used internally by the + * compiler... (prototypes are not correct though, but that + * doesn't really matter since they're not versioned). + */ +asmlinkage long __ucmpdi2(long long, long long); +asmlinkage long long __ashldi3(long long, int); +asmlinkage long long __ashrdi3(long long, int); +asmlinkage long long __lshrdi3(long long, int); +asmlinkage long __divsi3(long, long); +asmlinkage long __modsi3(long, long); +asmlinkage unsigned long __umodsi3(unsigned long, unsigned long); +asmlinkage long long __muldi3(long long, long long); +asmlinkage long __mulsi3(long, long); +asmlinkage long __udivsi3(long, long); +asmlinkage void *memcpy(void *, const void *, size_t); +asmlinkage void *memset(void *, int, size_t); +asmlinkage long strncpy_from_user(void *to, void *from, size_t n); + + /* gcc lib functions */ +EXPORT_SYMBOL(__ucmpdi2); +EXPORT_SYMBOL(__ashldi3); +EXPORT_SYMBOL(__ashrdi3); +EXPORT_SYMBOL(__lshrdi3); +EXPORT_SYMBOL(__divsi3); +EXPORT_SYMBOL(__modsi3); +EXPORT_SYMBOL(__umodsi3); +EXPORT_SYMBOL(__muldi3); +EXPORT_SYMBOL(__mulsi3); +EXPORT_SYMBOL(__udivsi3); +EXPORT_SYMBOL(memcpy); +EXPORT_SYMBOL(memset); +EXPORT_SYMBOL(strncpy_from_user); diff --git a/arch/h8300/kernel/module.c b/arch/h8300/kernel/module.c new file mode 100644 index 000000000000..515f6c4e8d80 --- /dev/null +++ b/arch/h8300/kernel/module.c @@ -0,0 +1,70 @@ +#include <linux/moduleloader.h> +#include <linux/elf.h> +#include <linux/vmalloc.h> +#include <linux/fs.h> +#include <linux/string.h> +#include <linux/kernel.h> + +int apply_relocate_add(Elf32_Shdr *sechdrs, + const char *strtab, + unsigned int symindex, + unsigned int relsec, + struct module *me) +{ + unsigned int i; + Elf32_Rela *rela = (void *)sechdrs[relsec].sh_addr; + + pr_debug("Applying relocate section %u to %u\n", relsec, + sechdrs[relsec].sh_info); + for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rela); i++) { + /* This is where to make the change */ + uint32_t *loc = + (uint32_t *)(sechdrs[sechdrs[relsec].sh_info].sh_addr + + rela[i].r_offset); + /* This is the symbol it is referring to. Note that all + undefined symbols have been resolved. */ + Elf32_Sym *sym = (Elf32_Sym *)sechdrs[symindex].sh_addr + + ELF32_R_SYM(rela[i].r_info); + uint32_t v = sym->st_value + rela[i].r_addend; + + switch (ELF32_R_TYPE(rela[i].r_info)) { + case R_H8_DIR24R8: + loc = (uint32_t *)((uint32_t)loc - 1); + *loc = (*loc & 0xff000000) | ((*loc & 0xffffff) + v); + break; + case R_H8_DIR24A8: + if (ELF32_R_SYM(rela[i].r_info)) + *loc += v; + break; + case R_H8_DIR32: + case R_H8_DIR32A16: + *loc += v; + break; + case R_H8_PCREL16: + v -= (unsigned long)loc + 2; + if ((Elf32_Sword)v > 0x7fff || + (Elf32_Sword)v < -(Elf32_Sword)0x8000) + goto overflow; + else + *(unsigned short *)loc = v; + break; + case R_H8_PCREL8: + v -= (unsigned long)loc + 1; + if ((Elf32_Sword)v > 0x7f || + (Elf32_Sword)v < -(Elf32_Sword)0x80) + goto overflow; + else + *(unsigned char *)loc = v; + break; + default: + pr_err("module %s: Unknown relocation: %u\n", + me->name, ELF32_R_TYPE(rela[i].r_info)); + return -ENOEXEC; + } + } + return 0; + overflow: + pr_err("module %s: relocation offset overflow: %08x\n", + me->name, rela[i].r_offset); + return -ENOEXEC; +} diff --git a/arch/h8300/kernel/sim-console.c b/arch/h8300/kernel/sim-console.c new file mode 100644 index 000000000000..a15edf0565d9 --- /dev/null +++ b/arch/h8300/kernel/sim-console.c @@ -0,0 +1,79 @@ +/* + * arch/h8300/kernel/early_printk.c + * + * Copyright (C) 2009 Yoshinori Sato <ysato@users.sourceforge.jp> + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include <linux/console.h> +#include <linux/tty.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/platform_device.h> + +static void sim_write(struct console *co, const char *ptr, + unsigned len) +{ + register const int fd __asm__("er0") = 1; /* stdout */ + register const char *_ptr __asm__("er1") = ptr; + register const unsigned _len __asm__("er2") = len; + + __asm__(".byte 0x5e,0x00,0x00,0xc7\n\t" /* jsr @0xc7 (sys_write) */ + : : "g"(fd), "g"(_ptr), "g"(_len)); +} + +static struct console sim_console = { + .name = "sim_console", + .write = sim_write, + .setup = NULL, + .flags = CON_PRINTBUFFER, + .index = -1, +}; + +static char sim_console_buf[32]; + +static int sim_probe(struct platform_device *pdev) +{ + if (sim_console.data) + return -EEXIST; + + if (!strstr(sim_console_buf, "keep")) + sim_console.flags |= CON_BOOT; + + register_console(&sim_console); + return 0; +} + +static int sim_remove(struct platform_device *pdev) +{ + return 0; +} + +static struct platform_driver sim_driver = { + .probe = sim_probe, + .remove = sim_remove, + .driver = { + .name = "h8300-sim", + .owner = THIS_MODULE, + }, +}; + +early_platform_init_buffer("earlyprintk", &sim_driver, + sim_console_buf, ARRAY_SIZE(sim_console_buf)); + +static struct platform_device sim_console_device = { + .name = "h8300-sim", + .id = 0, +}; + +static struct platform_device *devices[] __initdata = { + &sim_console_device, +}; + +void __init sim_console_register(void) +{ + early_platform_add_devices(devices, + ARRAY_SIZE(devices)); +} diff --git a/arch/h8300/kernel/syscalls.c b/arch/h8300/kernel/syscalls.c new file mode 100644 index 000000000000..1f9123a013d3 --- /dev/null +++ b/arch/h8300/kernel/syscalls.c @@ -0,0 +1,14 @@ +#include <linux/syscalls.h> +#include <linux/signal.h> +#include <linux/unistd.h> + +#undef __SYSCALL +#define __SYSCALL(nr, call) [nr] = (call), + +#define sys_mmap2 sys_mmap_pgoff + +asmlinkage int sys_rt_sigreturn(void); + +void *_sys_call_table[__NR_syscalls] = { +#include <asm/unistd.h> +}; |