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Diffstat (limited to 'arch/xtensa/kernel/setup.c')
-rw-r--r--arch/xtensa/kernel/setup.c184
1 files changed, 81 insertions, 103 deletions
diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
index ed184106e4cf..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>
@@ -37,25 +37,16 @@
#include <asm/bootparam.h>
#include <asm/kasan.h>
#include <asm/mmu_context.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;
@@ -63,8 +54,8 @@ extern unsigned long initrd_end;
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;
@@ -125,7 +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)
{
@@ -135,11 +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;
}
@@ -183,7 +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;
@@ -225,14 +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)
@@ -240,6 +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();
@@ -253,13 +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 */
@@ -271,49 +268,6 @@ 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;
-extern char _exception_text_start;
-extern char _exception_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
-#ifdef CONFIG_XIP_KERNEL
-extern char _xip_start[];
-extern char _xip_end[];
-#endif
-
static inline int __init_memblock mem_reserve(unsigned long start,
unsigned long end)
{
@@ -331,7 +285,7 @@ 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 */
@@ -345,53 +299,58 @@ void __init setup_arch(char **cmdline_p)
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_ADDR
- mem_reserve(__pa(&_WindowVectors_text_start),
- __pa(&_WindowVectors_text_end));
+#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));
+ 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_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();
@@ -562,19 +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
@@ -614,6 +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 "
@@ -663,11 +639,13 @@ c_show(struct seq_file *f, void *slot)
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. */
generated by cgit (git 2.34.1) at 2025-12-24 23:39:23 +0000