diff options
Diffstat (limited to 'roms/u-boot/arch/arm/lib/interrupts.c')
| -rw-r--r-- | roms/u-boot/arch/arm/lib/interrupts.c | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/roms/u-boot/arch/arm/lib/interrupts.c b/roms/u-boot/arch/arm/lib/interrupts.c new file mode 100644 index 000000000..6dc27d1d5 --- /dev/null +++ b/roms/u-boot/arch/arm/lib/interrupts.c @@ -0,0 +1,206 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) Copyright 2003 + * Texas Instruments <www.ti.com> + * + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Marius Groeger <mgroeger@sysgo.de> + * + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Alex Zuepke <azu@sysgo.de> + * + * (C) Copyright 2002-2004 + * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de> + * + * (C) Copyright 2004 + * Philippe Robin, ARM Ltd. <philippe.robin@arm.com> + */ + +#include <common.h> +#include <cpu_func.h> +#include <efi_loader.h> +#include <irq_func.h> +#include <asm/global_data.h> +#include <asm/proc-armv/ptrace.h> +#include <asm/ptrace.h> +#include <asm/u-boot-arm.h> + +DECLARE_GLOBAL_DATA_PTR; + +int interrupt_init(void) +{ + /* + * setup up stacks if necessary + */ + IRQ_STACK_START_IN = gd->irq_sp + 8; + + enable_interrupts(); + + return 0; +} + +void enable_interrupts(void) +{ + return; +} +int disable_interrupts(void) +{ + return 0; +} + +void bad_mode (void) +{ + panic ("Resetting CPU ...\n"); + reset_cpu(); +} + +static void show_efi_loaded_images(struct pt_regs *regs) +{ + efi_print_image_infos((void *)instruction_pointer(regs)); +} + +static void dump_instr(struct pt_regs *regs) +{ + unsigned long addr = instruction_pointer(regs); + const int thumb = thumb_mode(regs); + const int width = thumb ? 4 : 8; + int i; + + if (thumb) + addr &= ~1L; + else + addr &= ~3L; + printf("Code: "); + for (i = -4; i < 1 + !!thumb; i++) { + unsigned int val; + + if (thumb) + val = ((u16 *)addr)[i]; + else + val = ((u32 *)addr)[i]; + printf(i == 0 ? "(%0*x) " : "%0*x ", width, val); + } + printf("\n"); +} + +void show_regs (struct pt_regs *regs) +{ + unsigned long __maybe_unused flags; + const char __maybe_unused *processor_modes[] = { + "USER_26", "FIQ_26", "IRQ_26", "SVC_26", + "UK4_26", "UK5_26", "UK6_26", "UK7_26", + "UK8_26", "UK9_26", "UK10_26", "UK11_26", + "UK12_26", "UK13_26", "UK14_26", "UK15_26", + "USER_32", "FIQ_32", "IRQ_32", "SVC_32", + "UK4_32", "UK5_32", "UK6_32", "ABT_32", + "UK8_32", "UK9_32", "HYP_32", "UND_32", + "UK12_32", "UK13_32", "UK14_32", "SYS_32", + }; + + flags = condition_codes (regs); + + printf("pc : [<%08lx>] lr : [<%08lx>]\n", + instruction_pointer(regs), regs->ARM_lr); + if (gd->flags & GD_FLG_RELOC) { + printf("reloc pc : [<%08lx>] lr : [<%08lx>]\n", + instruction_pointer(regs) - gd->reloc_off, + regs->ARM_lr - gd->reloc_off); + } + printf("sp : %08lx ip : %08lx fp : %08lx\n", + regs->ARM_sp, regs->ARM_ip, regs->ARM_fp); + printf ("r10: %08lx r9 : %08lx r8 : %08lx\n", + regs->ARM_r10, regs->ARM_r9, regs->ARM_r8); + printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n", + regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4); + printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n", + regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0); + printf ("Flags: %c%c%c%c", + flags & CC_N_BIT ? 'N' : 'n', + flags & CC_Z_BIT ? 'Z' : 'z', + flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v'); + printf (" IRQs %s FIQs %s Mode %s%s\n", + interrupts_enabled (regs) ? "on" : "off", + fast_interrupts_enabled (regs) ? "on" : "off", + processor_modes[processor_mode (regs)], + thumb_mode (regs) ? " (T)" : ""); + dump_instr(regs); +} + +/* fixup PC to point to the instruction leading to the exception */ +static inline void fixup_pc(struct pt_regs *regs, int offset) +{ + uint32_t pc = instruction_pointer(regs) + offset; + regs->ARM_pc = pc | (regs->ARM_pc & PCMASK); +} + +void do_undefined_instruction (struct pt_regs *pt_regs) +{ + efi_restore_gd(); + printf ("undefined instruction\n"); + fixup_pc(pt_regs, -4); + show_regs (pt_regs); + show_efi_loaded_images(pt_regs); + bad_mode (); +} + +void do_software_interrupt (struct pt_regs *pt_regs) +{ + efi_restore_gd(); + printf ("software interrupt\n"); + fixup_pc(pt_regs, -4); + show_regs (pt_regs); + show_efi_loaded_images(pt_regs); + bad_mode (); +} + +void do_prefetch_abort (struct pt_regs *pt_regs) +{ + efi_restore_gd(); + printf ("prefetch abort\n"); + fixup_pc(pt_regs, -8); + show_regs (pt_regs); + show_efi_loaded_images(pt_regs); + bad_mode (); +} + +void do_data_abort (struct pt_regs *pt_regs) +{ + efi_restore_gd(); + printf ("data abort\n"); + fixup_pc(pt_regs, -8); + show_regs (pt_regs); + show_efi_loaded_images(pt_regs); + bad_mode (); +} + +void do_not_used (struct pt_regs *pt_regs) +{ + efi_restore_gd(); + printf ("not used\n"); + fixup_pc(pt_regs, -8); + show_regs (pt_regs); + show_efi_loaded_images(pt_regs); + bad_mode (); +} + +void do_fiq (struct pt_regs *pt_regs) +{ + efi_restore_gd(); + printf ("fast interrupt request\n"); + fixup_pc(pt_regs, -8); + show_regs (pt_regs); + show_efi_loaded_images(pt_regs); + bad_mode (); +} + +void do_irq (struct pt_regs *pt_regs) +{ + efi_restore_gd(); + printf ("interrupt request\n"); + fixup_pc(pt_regs, -8); + show_regs (pt_regs); + show_efi_loaded_images(pt_regs); + bad_mode (); +} |