diff options
Diffstat (limited to 'arch/riscv/lib')
| -rw-r--r-- | arch/riscv/lib/bootm.c | 97 | ||||
| -rw-r--r-- | arch/riscv/lib/cache.c | 36 | ||||
| -rw-r--r-- | arch/riscv/lib/crt0_riscv_efi.S | 12 | ||||
| -rw-r--r-- | arch/riscv/lib/interrupts.c | 58 | ||||
| -rw-r--r-- | arch/riscv/lib/setjmp.S | 2 |
5 files changed, 151 insertions, 54 deletions
diff --git a/arch/riscv/lib/bootm.c b/arch/riscv/lib/bootm.c index 2b5ccce9338..124aeefff83 100644 --- a/arch/riscv/lib/bootm.c +++ b/arch/riscv/lib/bootm.c @@ -8,6 +8,8 @@ #include <common.h> #include <command.h> +#include <dm.h> +#include <dm/root.h> #include <image.h> #include <asm/byteorder.h> #include <asm/csr.h> @@ -26,26 +28,41 @@ int arch_fixup_fdt(void *blob) return 0; } -int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images) +/** + * announce_and_cleanup() - Print message and prepare for kernel boot + * + * @fake: non-zero to do everything except actually boot + */ +static void announce_and_cleanup(int fake) { - void (*kernel)(ulong hart, void *dtb); - - /* - * allow the PREP bootm subcommand, it is required for bootm to work - */ - if (flag & BOOTM_STATE_OS_PREP) - return 0; + printf("\nStarting kernel ...%s\n\n", fake ? + "(fake run for tracing)" : ""); + bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel"); +#ifdef CONFIG_BOOTSTAGE_FDT + bootstage_fdt_add_report(); +#endif +#ifdef CONFIG_BOOTSTAGE_REPORT + bootstage_report(); +#endif - if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) - return 1; +#ifdef CONFIG_USB_DEVICE + udc_disconnect(); +#endif - kernel = (void (*)(ulong, void *))images->ep; + board_quiesce_devices(); - bootstage_mark(BOOTSTAGE_ID_RUN_OS); + /* + * Call remove function of all devices with a removal flag set. + * This may be useful for last-stage operations, like cancelling + * of DMA operation or releasing device internal buffers. + */ + dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL); - debug("## Transferring control to Linux (at address %08lx) ...\n", - (ulong)kernel); + cleanup_before_linux(); +} +static void boot_prep_linux(bootm_headers_t *images) +{ if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) { #ifdef CONFIG_OF_LIBFDT debug("using: FDT\n"); @@ -54,24 +71,50 @@ int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images) hang(); } #endif + } else { + printf("Device tree not found or missing FDT support\n"); + hang(); } +} - /* we assume that the kernel is in place */ - printf("\nStarting kernel ...\n\n"); +static void boot_jump_linux(bootm_headers_t *images, int flag) +{ + void (*kernel)(ulong hart, void *dtb); + int fake = (flag & BOOTM_STATE_OS_FAKE_GO); - /* - * Call remove function of all devices with a removal flag set. - * This may be useful for last-stage operations, like cancelling - * of DMA operation or releasing device internal buffers. - */ - dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL); + kernel = (void (*)(ulong, void *))images->ep; - cleanup_before_linux(); + bootstage_mark(BOOTSTAGE_ID_RUN_OS); + + debug("## Transferring control to Linux (at address %08lx) ...\n", + (ulong)kernel); - if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) - kernel(csr_read(mhartid), images->ft_addr); + announce_and_cleanup(fake); - /* does not return */ + if (!fake) { + if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) + kernel(csr_read(mhartid), images->ft_addr); + } +} + +int do_bootm_linux(int flag, int argc, char * const argv[], + bootm_headers_t *images) +{ + /* No need for those on RISC-V */ + if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE) + return -1; - return 1; + if (flag & BOOTM_STATE_OS_PREP) { + boot_prep_linux(images); + return 0; + } + + if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) { + boot_jump_linux(images, flag); + return 0; + } + + boot_prep_linux(images); + boot_jump_linux(images, flag); + return 0; } diff --git a/arch/riscv/lib/cache.c b/arch/riscv/lib/cache.c index 1d67c49c2c0..ae5c60716ff 100644 --- a/arch/riscv/lib/cache.c +++ b/arch/riscv/lib/cache.c @@ -6,44 +6,68 @@ #include <common.h> +void invalidate_icache_all(void) +{ + asm volatile ("fence.i" ::: "memory"); +} + +void flush_dcache_all(void) +{ + asm volatile ("fence" :::"memory"); +} void flush_dcache_range(unsigned long start, unsigned long end) { + flush_dcache_all(); } void invalidate_icache_range(unsigned long start, unsigned long end) { + /* + * RISC-V does not have an instruction for invalidating parts of the + * instruction cache. Invalidate all of it instead. + */ + invalidate_icache_all(); } void invalidate_dcache_range(unsigned long start, unsigned long end) { + flush_dcache_all(); +} + +void cache_flush(void) +{ + invalidate_icache_all(); + flush_dcache_all(); } void flush_cache(unsigned long addr, unsigned long size) { + invalidate_icache_all(); + flush_dcache_all(); } -void icache_enable(void) +__weak void icache_enable(void) { } -void icache_disable(void) +__weak void icache_disable(void) { } -int icache_status(void) +__weak int icache_status(void) { return 0; } -void dcache_enable(void) +__weak void dcache_enable(void) { } -void dcache_disable(void) +__weak void dcache_disable(void) { } -int dcache_status(void) +__weak int dcache_status(void) { return 0; } diff --git a/arch/riscv/lib/crt0_riscv_efi.S b/arch/riscv/lib/crt0_riscv_efi.S index 18f61f515ac..b7b5329e1f7 100644 --- a/arch/riscv/lib/crt0_riscv_efi.S +++ b/arch/riscv/lib/crt0_riscv_efi.S @@ -41,13 +41,13 @@ coff_header: .short 2 /* nr_sections */ .long 0 /* TimeDateStamp */ .long 0 /* PointerToSymbolTable */ - .long 1 /* NumberOfSymbols */ + .long 0 /* NumberOfSymbols */ .short section_table - optional_header /* SizeOfOptionalHeader */ - /* - * Characteristics: IMAGE_FILE_DEBUG_STRIPPED | - * IMAGE_FILE_EXECUTABLE_IMAGE | IMAGE_FILE_LINE_NUMS_STRIPPED - */ - .short 0x206 + /* Characteristics */ + .short (IMAGE_FILE_EXECUTABLE_IMAGE | \ + IMAGE_FILE_LINE_NUMS_STRIPPED | \ + IMAGE_FILE_LOCAL_SYMS_STRIPPED | \ + IMAGE_FILE_DEBUG_STRIPPED) optional_header: .short 0x20b /* PE32+ format */ .byte 0x02 /* MajorLinkerVersion */ diff --git a/arch/riscv/lib/interrupts.c b/arch/riscv/lib/interrupts.c index 0a0995a7af9..3aff0069773 100644 --- a/arch/riscv/lib/interrupts.c +++ b/arch/riscv/lib/interrupts.c @@ -12,7 +12,7 @@ #include <asm/system.h> #include <asm/encoding.h> -static void _exit_trap(int code, uint epc, struct pt_regs *regs); +static void _exit_trap(ulong code, ulong epc, struct pt_regs *regs); int interrupt_init(void) { @@ -34,17 +34,30 @@ int disable_interrupts(void) return 0; } -uint handle_trap(uint mcause, uint epc, struct pt_regs *regs) +ulong handle_trap(ulong cause, ulong epc, struct pt_regs *regs) { - uint is_int; + ulong is_irq, irq; - is_int = (mcause & MCAUSE_INT); - if ((is_int) && ((mcause & MCAUSE_CAUSE) == IRQ_M_EXT)) - external_interrupt(0); /* handle_m_ext_interrupt */ - else if ((is_int) && ((mcause & MCAUSE_CAUSE) == IRQ_M_TIMER)) - timer_interrupt(0); /* handle_m_timer_interrupt */ - else - _exit_trap(mcause, epc, regs); + is_irq = (cause & MCAUSE_INT); + irq = (cause & ~MCAUSE_INT); + + if (is_irq) { + switch (irq) { + case IRQ_M_EXT: + case IRQ_S_EXT: + external_interrupt(0); /* handle external interrupt */ + break; + case IRQ_M_TIMER: + case IRQ_S_TIMER: + timer_interrupt(0); /* handle timer interrupt */ + break; + default: + _exit_trap(cause, epc, regs); + break; + }; + } else { + _exit_trap(cause, epc, regs); + } return epc; } @@ -60,16 +73,33 @@ __attribute__((weak)) void timer_interrupt(struct pt_regs *regs) { } -static void _exit_trap(int code, uint epc, struct pt_regs *regs) +static void _exit_trap(ulong code, ulong epc, struct pt_regs *regs) { static const char * const exception_code[] = { "Instruction address misaligned", "Instruction access fault", "Illegal instruction", "Breakpoint", - "Load address misaligned" + "Load address misaligned", + "Load access fault", + "Store/AMO address misaligned", + "Store/AMO access fault", + "Environment call from U-mode", + "Environment call from S-mode", + "Reserved", + "Environment call from M-mode", + "Instruction page fault", + "Load page fault", + "Reserved", + "Store/AMO page fault", }; - printf("exception code: %d , %s , epc %08x , ra %08lx\n", - code, exception_code[code], epc, regs->ra); + if (code < ARRAY_SIZE(exception_code)) { + printf("exception code: %ld , %s , epc %lx , ra %lx\n", + code, exception_code[code], epc, regs->ra); + } else { + printf("Reserved\n"); + } + + hang(); } diff --git a/arch/riscv/lib/setjmp.S b/arch/riscv/lib/setjmp.S index 8f5a6a23aad..72bc9241f6a 100644 --- a/arch/riscv/lib/setjmp.S +++ b/arch/riscv/lib/setjmp.S @@ -6,7 +6,7 @@ #include <config.h> #include <linux/linkage.h> -#ifdef CONFIG_CPU_RISCV_64 +#ifdef CONFIG_ARCH_RV64I #define STORE_IDX(reg, idx) sd reg, (idx*8)(a0) #define LOAD_IDX(reg, idx) ld reg, (idx*8)(a0) #else |