X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fmips%2Fkernel%2Fsetup.c;h=a7fd69c5584bf2954263a0bf57c36c552cd641e7;hb=6a77f38946aaee1cd85eeec6cf4229b204c15071;hp=711ad59d66597740e016c2b04fbc261547feabfa;hpb=87fc8d1bb10cd459024a742c6a10961fefcef18f;p=linux-2.6.git diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c index 711ad59d6..a7fd69c55 100644 --- a/arch/mips/kernel/setup.c +++ b/arch/mips/kernel/setup.c @@ -56,8 +56,6 @@ unsigned int PCI_DMA_BUS_IS_PHYS; EXPORT_SYMBOL(PCI_DMA_BUS_IS_PHYS); -extern void * __rd_start, * __rd_end; - /* * Setup information * @@ -194,6 +192,68 @@ static inline void parse_cmdline_early(void) } } +static inline int parse_rd_cmdline(unsigned long* rd_start, unsigned long* rd_end) +{ + /* + * "rd_start=0xNNNNNNNN" defines the memory address of an initrd + * "rd_size=0xNN" it's size + */ + unsigned long start = 0; + unsigned long size = 0; + unsigned long end; + char cmd_line[CL_SIZE]; + char *start_str; + char *size_str; + char *tmp; + + strcpy(cmd_line, command_line); + *command_line = 0; + tmp = cmd_line; + /* Ignore "rd_start=" strings in other parameters. */ + start_str = strstr(cmd_line, "rd_start="); + if (start_str && start_str != cmd_line && *(start_str - 1) != ' ') + start_str = strstr(start_str, " rd_start="); + while (start_str) { + if (start_str != cmd_line) + strncat(command_line, tmp, start_str - tmp); + start = memparse(start_str + 9, &start_str); + tmp = start_str + 1; + start_str = strstr(start_str, " rd_start="); + } + if (*tmp) + strcat(command_line, tmp); + + strcpy(cmd_line, command_line); + *command_line = 0; + tmp = cmd_line; + /* Ignore "rd_size" strings in other parameters. */ + size_str = strstr(cmd_line, "rd_size="); + if (size_str && size_str != cmd_line && *(size_str - 1) != ' ') + size_str = strstr(size_str, " rd_size="); + while (size_str) { + if (size_str != cmd_line) + strncat(command_line, tmp, size_str - tmp); + size = memparse(size_str + 8, &size_str); + tmp = size_str + 1; + size_str = strstr(size_str, " rd_size="); + } + if (*tmp) + strcat(command_line, tmp); + +#ifdef CONFIG_MIPS64 + /* HACK: Guess if the sign extension was forgotten */ + if (start > 0x0000000080000000 && start < 0x00000000ffffffff) + start |= 0xffffffff00000000; +#endif + + end = start + size; + if (start && end) { + *rd_start = start; + *rd_end = end; + return 1; + } + return 0; +} #define PFN_UP(x) (((x) + PAGE_SIZE - 1) >> PAGE_SHIFT) #define PFN_DOWN(x) ((x) >> PAGE_SHIFT) @@ -205,30 +265,42 @@ static inline void parse_cmdline_early(void) static inline void bootmem_init(void) { unsigned long start_pfn; + unsigned long reserved_end = (unsigned long)&_end; #ifndef CONFIG_SGI_IP27 - unsigned long bootmap_size, max_low_pfn, first_usable_pfn; + unsigned long first_usable_pfn; + unsigned long bootmap_size; int i; #endif #ifdef CONFIG_BLK_DEV_INITRD - unsigned long tmp; - unsigned long *initrd_header; - - tmp = (((unsigned long)&_end + PAGE_SIZE-1) & PAGE_MASK) - 8; - if (tmp < (unsigned long)&_end) - tmp += PAGE_SIZE; - initrd_header = (unsigned long *)tmp; - if (initrd_header[0] == 0x494E5244) { - initrd_start = (unsigned long)&initrd_header[2]; - initrd_end = initrd_start + initrd_header[1]; + int initrd_reserve_bootmem = 0; + + /* Board specific code should have set up initrd_start and initrd_end */ + ROOT_DEV = Root_RAM0; + if (parse_rd_cmdline(&initrd_start, &initrd_end)) { + reserved_end = max(reserved_end, initrd_end); + initrd_reserve_bootmem = 1; + } else { + unsigned long tmp; + u32 *initrd_header; + + tmp = ((reserved_end + PAGE_SIZE-1) & PAGE_MASK) - sizeof(u32) * 2; + if (tmp < reserved_end) + tmp += PAGE_SIZE; + initrd_header = (u32 *)tmp; + if (initrd_header[0] == 0x494E5244) { + initrd_start = (unsigned long)&initrd_header[2]; + initrd_end = initrd_start + initrd_header[1]; + reserved_end = max(reserved_end, initrd_end); + initrd_reserve_bootmem = 1; + } } - start_pfn = PFN_UP(CPHYSADDR((&_end)+(initrd_end - initrd_start) + PAGE_SIZE)); -#else +#endif /* CONFIG_BLK_DEV_INITRD */ + /* * Partially used pages are not usable - thus * we are rounding upwards. */ - start_pfn = PFN_UP(CPHYSADDR(&_end)); -#endif /* CONFIG_BLK_DEV_INITRD */ + start_pfn = PFN_UP(CPHYSADDR(reserved_end)); #ifndef CONFIG_SGI_IP27 /* Find the highest page frame number we have available. */ @@ -341,29 +413,28 @@ static inline void bootmem_init(void) /* Reserve the bootmap memory. */ reserve_bootmem(PFN_PHYS(first_usable_pfn), bootmap_size); -#endif +#endif /* CONFIG_SGI_IP27 */ #ifdef CONFIG_BLK_DEV_INITRD - /* Board specific code should have set up initrd_start and initrd_end */ - ROOT_DEV = Root_RAM0; - if (&__rd_start != &__rd_end) { - initrd_start = (unsigned long)&__rd_start; - initrd_end = (unsigned long)&__rd_end; - } initrd_below_start_ok = 1; if (initrd_start) { unsigned long initrd_size = ((unsigned char *)initrd_end) - ((unsigned char *)initrd_start); printk("Initial ramdisk at: 0x%p (%lu bytes)\n", - (void *)initrd_start, - initrd_size); + (void *)initrd_start, initrd_size); if (CPHYSADDR(initrd_end) > PFN_PHYS(max_low_pfn)) { printk("initrd extends beyond end of memory " "(0x%0*Lx > 0x%0*Lx)\ndisabling initrd\n", - sizeof(long) * 2, CPHYSADDR(initrd_end), - sizeof(long) * 2, PFN_PHYS(max_low_pfn)); + sizeof(long) * 2, + (unsigned long long)CPHYSADDR(initrd_end), + sizeof(long) * 2, + (unsigned long long)PFN_PHYS(max_low_pfn)); initrd_start = initrd_end = 0; + initrd_reserve_bootmem = 0; } + + if (initrd_reserve_bootmem) + reserve_bootmem(CPHYSADDR(initrd_start), initrd_size); } #endif /* CONFIG_BLK_DEV_INITRD */ } @@ -372,10 +443,21 @@ static inline void resource_init(void) { int i; +#if defined(CONFIG_MIPS64) && !defined(CONFIG_BUILD_ELF64) + /* + * The 64bit code in 32bit object format trick can't represent + * 64bit wide relocations for linker script symbols. + */ + code_resource.start = CPHYSADDR(&_text); + code_resource.end = CPHYSADDR(&_etext) - 1; + data_resource.start = CPHYSADDR(&_etext); + data_resource.end = CPHYSADDR(&_edata) - 1; +#else code_resource.start = virt_to_phys(&_text); code_resource.end = virt_to_phys(&_etext) - 1; data_resource.start = virt_to_phys(&_etext); data_resource.end = virt_to_phys(&_edata) - 1; +#endif /* * Request address space for all standard RAM. @@ -453,31 +535,10 @@ static void __init do_earlyinitcalls(void) void __init setup_arch(char **cmdline_p) { - unsigned int status; - cpu_probe(); prom_init(); cpu_report(); -#ifdef CONFIG_MIPS32 - /* Disable coprocessors and set FPU for 16/32 FPR register model */ - status = read_c0_status(); - status &= ~(ST0_CU1|ST0_CU2|ST0_CU3|ST0_KX|ST0_SX|ST0_FR); - status |= ST0_CU0; - write_c0_status(status); -#endif -#ifdef CONFIG_MIPS64 - /* - * On IP27, I am seeing the TS bit set when the kernel is loaded. - * Maybe because the kernel is in ckseg0 and not xkphys? Clear it - * anyway ... - */ - status = read_c0_status(); - status &= ~(ST0_BEV|ST0_TS|ST0_CU1|ST0_CU2|ST0_CU3); - status |= (ST0_CU0|ST0_KX|ST0_SX|ST0_FR); - write_c0_status(status); -#endif - #if defined(CONFIG_VT) #if defined(CONFIG_VGA_CONSOLE) conswitchp = &vga_con;