diff options
Diffstat (limited to 'arch/xtensa/kernel/setup.c')
| -rw-r--r-- | arch/xtensa/kernel/setup.c | 211 |
1 files changed, 98 insertions, 113 deletions
diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c index 4ec6fbb696bf..f72e280363be 100644 --- a/arch/xtensa/kernel/setup.c +++ b/arch/xtensa/kernel/setup.c @@ -19,9 +19,9 @@ #include <linux/init.h> #include <linux/mm.h> #include <linux/proc_fs.h> -#include <linux/screen_info.h> #include <linux/kernel.h> #include <linux/percpu.h> +#include <linux/reboot.h> #include <linux/cpu.h> #include <linux/of.h> #include <linux/of_fdt.h> @@ -37,36 +37,25 @@ #include <asm/bootparam.h> #include <asm/kasan.h> #include <asm/mmu_context.h> -#include <asm/pgtable.h> -#include <asm/processor.h> -#include <asm/timex.h> -#include <asm/platform.h> #include <asm/page.h> -#include <asm/setup.h> #include <asm/param.h> +#include <asm/platform.h> +#include <asm/processor.h> +#include <asm/sections.h> +#include <asm/setup.h> #include <asm/smp.h> #include <asm/sysmem.h> - -#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE) -struct screen_info screen_info = { - .orig_x = 0, - .orig_y = 24, - .orig_video_cols = 80, - .orig_video_lines = 24, - .orig_video_isVGA = 1, - .orig_video_points = 16, -}; -#endif +#include <asm/timex.h> +#include <asm/traps.h> #ifdef CONFIG_BLK_DEV_INITRD extern unsigned long initrd_start; extern unsigned long initrd_end; -int initrd_is_mapped = 0; extern int initrd_below_start_ok; #endif -#ifdef CONFIG_OF -void *dtb_start = __dtb_start; +#ifdef CONFIG_USE_OF +static void *dtb_start __initdata = __dtb_start; #endif extern unsigned long loops_per_jiffy; @@ -95,7 +84,7 @@ typedef struct tagtable { } tagtable_t; #define __tagtable(tag, fn) static tagtable_t __tagtable_##fn \ - __attribute__((used, section(".taglist"))) = { tag, fn } + __section(".taglist") __attribute__((used)) = { tag, fn } /* parse current tag */ @@ -127,7 +116,7 @@ __tagtable(BP_TAG_INITRD, parse_tag_initrd); #endif /* CONFIG_BLK_DEV_INITRD */ -#ifdef CONFIG_OF +#ifdef CONFIG_USE_OF static int __init parse_tag_fdt(const bp_tag_t *tag) { @@ -137,11 +126,11 @@ static int __init parse_tag_fdt(const bp_tag_t *tag) __tagtable(BP_TAG_FDT, parse_tag_fdt); -#endif /* CONFIG_OF */ +#endif /* CONFIG_USE_OF */ static int __init parse_tag_cmdline(const bp_tag_t* tag) { - strlcpy(command_line, (char *)(tag->data), COMMAND_LINE_SIZE); + strscpy(command_line, (char *)(tag->data), COMMAND_LINE_SIZE); return 0; } @@ -185,7 +174,7 @@ static int __init parse_bootparam(const bp_tag_t *tag) } #endif -#ifdef CONFIG_OF +#ifdef CONFIG_USE_OF #if !XCHAL_HAVE_PTP_MMU || XCHAL_HAVE_SPANNING_WAY unsigned long xtensa_kio_paddr = XCHAL_KIO_DEFAULT_PADDR; @@ -227,14 +216,14 @@ static int __init xtensa_dt_io_area(unsigned long node, const char *uname, void __init early_init_devtree(void *params) { - early_init_dt_scan(params); + early_init_dt_scan(params, __pa(params)); of_scan_flat_dt(xtensa_dt_io_area, NULL); if (!command_line[0]) - strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); + strscpy(command_line, boot_command_line, COMMAND_LINE_SIZE); } -#endif /* CONFIG_OF */ +#endif /* CONFIG_USE_OF */ /* * Initialize architecture. (Early stage) @@ -242,6 +231,12 @@ void __init early_init_devtree(void *params) void __init init_arch(bp_tag_t *bp_start) { + /* Initialize basic exception handling if configuration may need it */ + + if (IS_ENABLED(CONFIG_KASAN) || + IS_ENABLED(CONFIG_XTENSA_LOAD_STORE)) + early_trap_init(); + /* Initialize MMU. */ init_mmu(); @@ -255,13 +250,13 @@ void __init init_arch(bp_tag_t *bp_start) if (bp_start) parse_bootparam(bp_start); -#ifdef CONFIG_OF +#ifdef CONFIG_USE_OF early_init_devtree(dtb_start); #endif #ifdef CONFIG_CMDLINE_BOOL if (!command_line[0]) - strlcpy(command_line, default_command_line, COMMAND_LINE_SIZE); + strscpy(command_line, default_command_line, COMMAND_LINE_SIZE); #endif /* Early hook for platforms */ @@ -273,44 +268,8 @@ void __init init_arch(bp_tag_t *bp_start) * Initialize system. Setup memory and reserve regions. */ -extern char _end[]; -extern char _stext[]; -extern char _WindowVectors_text_start; -extern char _WindowVectors_text_end; -extern char _DebugInterruptVector_text_start; -extern char _DebugInterruptVector_text_end; -extern char _KernelExceptionVector_text_start; -extern char _KernelExceptionVector_text_end; -extern char _UserExceptionVector_text_start; -extern char _UserExceptionVector_text_end; -extern char _DoubleExceptionVector_text_start; -extern char _DoubleExceptionVector_text_end; -#if XCHAL_EXCM_LEVEL >= 2 -extern char _Level2InterruptVector_text_start; -extern char _Level2InterruptVector_text_end; -#endif -#if XCHAL_EXCM_LEVEL >= 3 -extern char _Level3InterruptVector_text_start; -extern char _Level3InterruptVector_text_end; -#endif -#if XCHAL_EXCM_LEVEL >= 4 -extern char _Level4InterruptVector_text_start; -extern char _Level4InterruptVector_text_end; -#endif -#if XCHAL_EXCM_LEVEL >= 5 -extern char _Level5InterruptVector_text_start; -extern char _Level5InterruptVector_text_end; -#endif -#if XCHAL_EXCM_LEVEL >= 6 -extern char _Level6InterruptVector_text_start; -extern char _Level6InterruptVector_text_end; -#endif -#ifdef CONFIG_SMP -extern char _SecondaryResetVector_text_start; -extern char _SecondaryResetVector_text_end; -#endif - -static inline int mem_reserve(unsigned long start, unsigned long end) +static inline int __init_memblock mem_reserve(unsigned long start, + unsigned long end) { return memblock_reserve(start, end - start); } @@ -326,64 +285,72 @@ void __init setup_arch(char **cmdline_p) *cmdline_p = command_line; platform_setup(cmdline_p); - strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE); + strscpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE); /* Reserve some memory regions */ #ifdef CONFIG_BLK_DEV_INITRD - if (initrd_start < initrd_end) { - initrd_is_mapped = mem_reserve(__pa(initrd_start), - __pa(initrd_end)) == 0; + if (initrd_start < initrd_end && + !mem_reserve(__pa(initrd_start), __pa(initrd_end))) initrd_below_start_ok = 1; - } else { + else initrd_start = 0; - } #endif mem_reserve(__pa(_stext), __pa(_end)); +#ifdef CONFIG_XIP_KERNEL +#ifdef CONFIG_VECTORS_ADDR + mem_reserve(__pa(_xip_text_start), __pa(_xip_text_end)); +#endif + mem_reserve(__pa(_xip_start), __pa(_xip_end)); +#endif -#ifdef CONFIG_VECTORS_OFFSET - mem_reserve(__pa(&_WindowVectors_text_start), - __pa(&_WindowVectors_text_end)); +#ifdef CONFIG_VECTORS_ADDR +#ifdef SUPPORT_WINDOWED + mem_reserve(__pa(_WindowVectors_text_start), + __pa(_WindowVectors_text_end)); +#endif - mem_reserve(__pa(&_DebugInterruptVector_text_start), - __pa(&_DebugInterruptVector_text_end)); + mem_reserve(__pa(_DebugInterruptVector_text_start), + __pa(_DebugInterruptVector_text_end)); - mem_reserve(__pa(&_KernelExceptionVector_text_start), - __pa(&_KernelExceptionVector_text_end)); + mem_reserve(__pa(_KernelExceptionVector_text_start), + __pa(_KernelExceptionVector_text_end)); - mem_reserve(__pa(&_UserExceptionVector_text_start), - __pa(&_UserExceptionVector_text_end)); + mem_reserve(__pa(_UserExceptionVector_text_start), + __pa(_UserExceptionVector_text_end)); - mem_reserve(__pa(&_DoubleExceptionVector_text_start), - __pa(&_DoubleExceptionVector_text_end)); + mem_reserve(__pa(_DoubleExceptionVector_text_start), + __pa(_DoubleExceptionVector_text_end)); + mem_reserve(__pa(_exception_text_start), + __pa(_exception_text_end)); #if XCHAL_EXCM_LEVEL >= 2 - mem_reserve(__pa(&_Level2InterruptVector_text_start), - __pa(&_Level2InterruptVector_text_end)); + mem_reserve(__pa(_Level2InterruptVector_text_start), + __pa(_Level2InterruptVector_text_end)); #endif #if XCHAL_EXCM_LEVEL >= 3 - mem_reserve(__pa(&_Level3InterruptVector_text_start), - __pa(&_Level3InterruptVector_text_end)); + mem_reserve(__pa(_Level3InterruptVector_text_start), + __pa(_Level3InterruptVector_text_end)); #endif #if XCHAL_EXCM_LEVEL >= 4 - mem_reserve(__pa(&_Level4InterruptVector_text_start), - __pa(&_Level4InterruptVector_text_end)); + mem_reserve(__pa(_Level4InterruptVector_text_start), + __pa(_Level4InterruptVector_text_end)); #endif #if XCHAL_EXCM_LEVEL >= 5 - mem_reserve(__pa(&_Level5InterruptVector_text_start), - __pa(&_Level5InterruptVector_text_end)); + mem_reserve(__pa(_Level5InterruptVector_text_start), + __pa(_Level5InterruptVector_text_end)); #endif #if XCHAL_EXCM_LEVEL >= 6 - mem_reserve(__pa(&_Level6InterruptVector_text_start), - __pa(&_Level6InterruptVector_text_end)); + mem_reserve(__pa(_Level6InterruptVector_text_start), + __pa(_Level6InterruptVector_text_end)); #endif -#endif /* CONFIG_VECTORS_OFFSET */ +#endif /* CONFIG_VECTORS_ADDR */ -#ifdef CONFIG_SMP - mem_reserve(__pa(&_SecondaryResetVector_text_start), - __pa(&_SecondaryResetVector_text_end)); +#ifdef CONFIG_SECONDARY_RESET_VECTOR + mem_reserve(__pa(_SecondaryResetVector_text_start), + __pa(_SecondaryResetVector_text_end)); #endif parse_early_param(); bootmem_init(); @@ -400,14 +367,8 @@ void __init setup_arch(char **cmdline_p) #ifdef CONFIG_VT # if defined(CONFIG_VGA_CONSOLE) conswitchp = &vga_con; -# elif defined(CONFIG_DUMMY_CONSOLE) - conswitchp = &dummy_con; # endif #endif - -#ifdef CONFIG_PCI - platform_pcibios_init(); -#endif } static DEFINE_PER_CPU(struct cpu, cpu_data); @@ -514,6 +475,7 @@ void cpu_reset(void) "add %2, %2, %7\n\t" "addi %0, %0, -1\n\t" "bnez %0, 1b\n\t" + "isync\n\t" /* Jump to identity mapping */ "jx %3\n" "2:\n\t" @@ -559,19 +521,30 @@ void cpu_reset(void) void machine_restart(char * cmd) { - platform_restart(); + local_irq_disable(); + smp_send_stop(); + do_kernel_restart(cmd); + pr_err("Reboot failed -- System halted\n"); + while (1) + cpu_relax(); } void machine_halt(void) { - platform_halt(); - while (1); + local_irq_disable(); + smp_send_stop(); + do_kernel_power_off(); + while (1) + cpu_relax(); } void machine_power_off(void) { - platform_power_off(); - while (1); + local_irq_disable(); + smp_send_stop(); + do_kernel_power_off(); + while (1) + cpu_relax(); } #ifdef CONFIG_PROC_FS @@ -611,6 +584,12 @@ c_show(struct seq_file *f, void *slot) # if XCHAL_HAVE_OCD "ocd " # endif +#if XCHAL_HAVE_TRAX + "trax " +#endif +#if XCHAL_NUM_PERF_COUNTERS + "perf " +#endif #endif #if XCHAL_HAVE_DENSITY "density " @@ -651,17 +630,22 @@ c_show(struct seq_file *f, void *slot) #if XCHAL_HAVE_S32C1I "s32c1i " #endif +#if XCHAL_HAVE_EXCLUSIVE + "exclusive " +#endif "\n"); /* Registers. */ seq_printf(f,"physical aregs\t: %d\n" "misc regs\t: %d\n" "ibreak\t\t: %d\n" - "dbreak\t\t: %d\n", + "dbreak\t\t: %d\n" + "perf counters\t: %d\n", XCHAL_NUM_AREGS, XCHAL_NUM_MISC_REGS, XCHAL_NUM_IBREAK, - XCHAL_NUM_DBREAK); + XCHAL_NUM_DBREAK, + XCHAL_NUM_PERF_COUNTERS); /* Interrupt. */ @@ -718,7 +702,8 @@ c_start(struct seq_file *f, loff_t *pos) static void * c_next(struct seq_file *f, void *v, loff_t *pos) { - return NULL; + ++*pos; + return c_start(f, pos); } static void |