Add makefile, interrupts.c and boot.c,... functions to support RISC-V arch. Signed-off-by: Rick Chen <rick@andestech.com> Signed-off-by: Rick Chen <rickchen36@gmail.com> Signed-off-by: Greentime Hu <green.hu@gmail.com> Cc: Padmarao Begari <Padmarao.Begari@microsemi.com>master
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#
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# (C) Copyright 2000-2006
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# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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#
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# Copyright (C) 2017 Andes Technology Corporation
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# Rick Chen, Andes Technology Corporation <rick@andestech.com>
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#
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# SPDX-License-Identifier: GPL-2.0+
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#
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obj-$(CONFIG_CMD_BOOTM) += bootm.o
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obj-$(CONFIG_CMD_GO) += boot.o
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obj-y += cache.o
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obj-y += interrupts.o
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/*
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* Copyright (C) 2017 Andes Technology Corporation |
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* Rick Chen, Andes Technology Corporation <rick@andestech.com> |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ |
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#include <common.h> |
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#include <command.h> |
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DECLARE_GLOBAL_DATA_PTR; |
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unsigned long do_go_exec(ulong (*entry)(int, char * const []), |
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int argc, char * const argv[]) |
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{ |
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cleanup_before_linux(); |
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return entry(argc, argv); |
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} |
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/*
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* Copyright (C) 2011 Andes Technology Corporation |
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* Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com> |
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* Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com> |
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* Rick Chen, Andes Technology Corporation <rick@andestech.com> |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ |
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#include <common.h> |
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#include <command.h> |
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#include <image.h> |
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#include <u-boot/zlib.h> |
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#include <asm/byteorder.h> |
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#include <asm/bootm.h> |
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DECLARE_GLOBAL_DATA_PTR; |
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int arch_fixup_fdt(void *blob) |
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{ |
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return 0; |
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} |
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#if defined(CONFIG_SETUP_MEMORY_TAGS) || \ |
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defined(CONFIG_CMDLINE_TAG) || \
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defined(CONFIG_INITRD_TAG) || \
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defined(CONFIG_SERIAL_TAG) || \
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defined(CONFIG_REVISION_TAG) |
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static void setup_start_tag(bd_t *bd); |
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# ifdef CONFIG_SETUP_MEMORY_TAGS |
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static void setup_memory_tags(bd_t *bd); |
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# endif |
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static void setup_commandline_tag(bd_t *bd, char *commandline); |
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# ifdef CONFIG_INITRD_TAG |
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static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end); |
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# endif |
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static void setup_end_tag(bd_t *bd); |
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static struct tag *params; |
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#endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */ |
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int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images) |
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{ |
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bd_t *bd = gd->bd; |
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char *s; |
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int machid = bd->bi_arch_number; |
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void (*theKernel)(int zero, int arch, uint params); |
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#ifdef CONFIG_CMDLINE_TAG |
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char *commandline = env_get("bootargs"); |
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#endif |
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/*
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* allow the PREP bootm subcommand, it is required for bootm to work |
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*/ |
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if (flag & BOOTM_STATE_OS_PREP) |
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return 0; |
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if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) |
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return 1; |
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theKernel = (void (*)(int, int, uint))images->ep; |
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s = env_get("machid"); |
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if (s) { |
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machid = simple_strtoul(s, NULL, 16); |
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printf("Using machid 0x%x from environment\n", machid); |
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} |
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bootstage_mark(BOOTSTAGE_ID_RUN_OS); |
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debug("## Transferring control to Linux (at address %08lx) ...\n", |
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(ulong)theKernel); |
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if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) { |
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#ifdef CONFIG_OF_LIBFDT |
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debug("using: FDT\n"); |
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if (image_setup_linux(images)) { |
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printf("FDT creation failed! hanging..."); |
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hang(); |
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} |
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#endif |
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} else if (BOOTM_ENABLE_TAGS) { |
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#if defined(CONFIG_SETUP_MEMORY_TAGS) || \ |
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defined(CONFIG_CMDLINE_TAG) || \
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defined(CONFIG_INITRD_TAG) || \
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defined(CONFIG_SERIAL_TAG) || \
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defined(CONFIG_REVISION_TAG) |
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setup_start_tag(bd); |
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#ifdef CONFIG_SERIAL_TAG |
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setup_serial_tag(¶ms); |
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#endif |
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#ifdef CONFIG_REVISION_TAG |
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setup_revision_tag(¶ms); |
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#endif |
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#ifdef CONFIG_SETUP_MEMORY_TAGS |
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setup_memory_tags(bd); |
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#endif |
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#ifdef CONFIG_CMDLINE_TAG |
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setup_commandline_tag(bd, commandline); |
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#endif |
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#ifdef CONFIG_INITRD_TAG |
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if (images->rd_start && images->rd_end) |
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setup_initrd_tag(bd, images->rd_start, images->rd_end); |
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#endif |
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setup_end_tag(bd); |
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#endif |
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/* we assume that the kernel is in place */ |
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printf("\nStarting kernel ...\n\n"); |
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#ifdef CONFIG_USB_DEVICE |
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{ |
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extern void udc_disconnect(void); |
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udc_disconnect(); |
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} |
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#endif |
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} |
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cleanup_before_linux(); |
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if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) |
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theKernel(0, machid, (unsigned long)images->ft_addr); |
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else |
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theKernel(0, machid, bd->bi_boot_params); |
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/* does not return */ |
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return 1; |
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} |
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#if defined(CONFIG_SETUP_MEMORY_TAGS) || \ |
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defined(CONFIG_CMDLINE_TAG) || \
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defined(CONFIG_INITRD_TAG) || \
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defined(CONFIG_SERIAL_TAG) || \
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defined(CONFIG_REVISION_TAG) |
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static void setup_start_tag(bd_t *bd) |
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{ |
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params = (struct tag *)bd->bi_boot_params; |
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params->hdr.tag = ATAG_CORE; |
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params->hdr.size = tag_size(tag_core); |
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params->u.core.flags = 0; |
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params->u.core.pagesize = 0; |
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params->u.core.rootdev = 0; |
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params = tag_next(params); |
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} |
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#ifdef CONFIG_SETUP_MEMORY_TAGS |
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static void setup_memory_tags(bd_t *bd) |
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{ |
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int i; |
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for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) { |
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params->hdr.tag = ATAG_MEM; |
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params->hdr.size = tag_size(tag_mem32); |
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params->u.mem.start = bd->bi_dram[i].start; |
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params->u.mem.size = bd->bi_dram[i].size; |
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params = tag_next(params); |
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} |
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} |
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#endif /* CONFIG_SETUP_MEMORY_TAGS */ |
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static void setup_commandline_tag(bd_t *bd, char *commandline) |
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{ |
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char *p; |
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if (!commandline) |
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return; |
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/* eat leading white space */ |
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for (p = commandline; *p == ' '; p++) |
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; |
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/* skip non-existent command lines so the kernel will still
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* use its default command line. |
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*/ |
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if (*p == '\0') |
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return; |
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params->hdr.tag = ATAG_CMDLINE; |
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params->hdr.size = |
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(sizeof(struct tag_header) + strlen(p) + 1 + 4) >> 2; |
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strcpy(params->u.cmdline.cmdline, p) |
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; |
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params = tag_next(params); |
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} |
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#ifdef CONFIG_INITRD_TAG |
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static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end) |
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{ |
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/* an ATAG_INITRD node tells the kernel where the compressed
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* ramdisk can be found. ATAG_RDIMG is a better name, actually. |
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*/ |
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params->hdr.tag = ATAG_INITRD2; |
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params->hdr.size = tag_size(tag_initrd); |
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params->u.initrd.start = initrd_start; |
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params->u.initrd.size = initrd_end - initrd_start; |
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params = tag_next(params); |
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} |
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#endif /* CONFIG_INITRD_TAG */ |
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#ifdef CONFIG_SERIAL_TAG |
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void setup_serial_tag(struct tag **tmp) |
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{ |
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struct tag *params; |
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struct tag_serialnr serialnr; |
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void get_board_serial(struct tag_serialnr *serialnr); |
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params = *tmp; |
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get_board_serial(&serialnr); |
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params->hdr.tag = ATAG_SERIAL; |
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params->hdr.size = tag_size(tag_serialnr); |
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params->u.serialnr.low = serialnr.low; |
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params->u.serialnr.high = serialnr.high; |
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params = tag_next(params); |
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*tmp = params; |
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} |
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#endif |
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#ifdef CONFIG_REVISION_TAG |
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void setup_revision_tag(struct tag **in_params) |
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{ |
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u32 rev; |
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u32 get_board_rev(void); |
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rev = get_board_rev(); |
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params->hdr.tag = ATAG_REVISION; |
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params->hdr.size = tag_size(tag_revision); |
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params->u.revision.rev = rev; |
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params = tag_next(params); |
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} |
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#endif /* CONFIG_REVISION_TAG */ |
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static void setup_end_tag(bd_t *bd) |
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{ |
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params->hdr.tag = ATAG_NONE; |
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params->hdr.size = 0; |
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} |
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#endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */ |
@ -0,0 +1,50 @@ |
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/*
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* Copyright (C) 2017 Andes Technology Corporation |
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* Rick Chen, Andes Technology Corporation <rick@andestech.com> |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ |
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#include <common.h> |
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void flush_dcache_range(unsigned long start, unsigned long end) |
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{ |
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} |
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void invalidate_icache_range(unsigned long start, unsigned long end) |
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{ |
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} |
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void invalidate_dcache_range(unsigned long start, unsigned long end) |
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{ |
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} |
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void flush_cache(unsigned long addr, unsigned long size) |
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{ |
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} |
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void icache_enable(void) |
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{ |
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} |
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void icache_disable(void) |
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{ |
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} |
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int icache_status(void) |
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{ |
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return 0; |
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} |
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void dcache_enable(void) |
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{ |
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} |
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void dcache_disable(void) |
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{ |
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} |
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int dcache_status(void) |
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{ |
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return 0; |
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} |
@ -0,0 +1,76 @@ |
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/*
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* Copyright (c) 2016-17 Microsemi Corporation. |
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* Padmarao Begari, Microsemi Corporation <padmarao.begari@microsemi.com> |
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* |
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* Copyright (C) 2017 Andes Technology Corporation |
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* Rick Chen, Andes Technology Corporation <rick@andestech.com> |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ |
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#include <common.h> |
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#include <asm/ptrace.h> |
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#include <asm/system.h> |
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#include <asm/encoding.h> |
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static void _exit_trap(int code, uint epc, struct pt_regs *regs); |
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int interrupt_init(void) |
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{ |
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return 0; |
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} |
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/*
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* enable interrupts |
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*/ |
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void enable_interrupts(void) |
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{ |
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} |
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/*
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* disable interrupts |
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*/ |
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int disable_interrupts(void) |
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{ |
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return 0; |
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} |
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uint handle_trap(uint mcause, uint epc, struct pt_regs *regs) |
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{ |
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uint is_int; |
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is_int = (mcause & MCAUSE_INT); |
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if ((is_int) && ((mcause & MCAUSE_CAUSE) == IRQ_M_EXT)) |
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external_interrupt(0); /* handle_m_ext_interrupt */ |
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else if ((is_int) && ((mcause & MCAUSE_CAUSE) == IRQ_M_TIMER)) |
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timer_interrupt(0); /* handle_m_timer_interrupt */ |
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else |
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_exit_trap(mcause, epc, regs); |
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return epc; |
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} |
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/*
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*Entry Point for PLIC Interrupt Handler |
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*/ |
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__attribute__((weak)) void external_interrupt(struct pt_regs *regs) |
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{ |
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} |
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__attribute__((weak)) void timer_interrupt(struct pt_regs *regs) |
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{ |
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} |
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static void _exit_trap(int code, uint epc, struct pt_regs *regs) |
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{ |
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static const char *exception_code[] = { |
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"Instruction address misaligned", |
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"Instruction access fault", |
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"Illegal instruction", |
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"Breakpoint", |
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"Load address misaligned" |
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}; |
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printf("exception code: %d , %s , epc %08x , ra %08lx\n", |
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code, exception_code[code], epc, regs->ra); |
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} |
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