mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-18 02:38:56 +00:00
35b65dd8ef
Historically, the reset_cpu() function had an `addr` parameter which was
meant to pass in an address of the reset vector location, where the CPU
should reset to. This feature is no longer used anywhere in U-Boot as
all reset_cpu() implementations now ignore the passed value. Generic
code has been added which always calls reset_cpu() with `0` which means
this feature can no longer be used easily anyway.
Over time, many implementations seem to have "misunderstood" the
existence of this parameter as a way to customize/parameterize the reset
(e.g. COLD vs WARM resets). As this is not properly supported, the
code will almost always not do what it is intended to (because all
call-sites just call reset_cpu() with 0).
To avoid confusion and to clean up the codebase from unused left-overs
of the past, remove the `addr` parameter entirely. Code which intends
to support different kinds of resets should be rewritten as a sysreset
driver instead.
This transformation was done with the following coccinelle patch:
@@
expression argvalue;
@@
- reset_cpu(argvalue)
+ reset_cpu()
@@
identifier argname;
type argtype;
@@
- reset_cpu(argtype argname)
+ reset_cpu(void)
{ ... }
Signed-off-by: Harald Seiler <hws@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
189 lines
3.4 KiB
C
189 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2016 Beniamino Galvani <b.galvani@gmail.com>
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*/
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#include <common.h>
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#include <cpu_func.h>
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#include <fastboot.h>
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#include <init.h>
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#include <net.h>
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#include <asm/arch/boot.h>
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#include <env.h>
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#include <asm/cache.h>
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#include <asm/global_data.h>
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#include <asm/ptrace.h>
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#include <linux/libfdt.h>
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#include <linux/err.h>
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#include <asm/arch/mem.h>
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#include <asm/arch/sm.h>
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#include <asm/armv8/mmu.h>
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#include <asm/unaligned.h>
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#include <efi_loader.h>
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#include <u-boot/crc.h>
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#if CONFIG_IS_ENABLED(FASTBOOT)
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#include <asm/psci.h>
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#include <fastboot.h>
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#endif
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DECLARE_GLOBAL_DATA_PTR;
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__weak int board_init(void)
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{
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return 0;
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}
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int dram_init(void)
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{
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const fdt64_t *val;
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int offset;
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int len;
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offset = fdt_path_offset(gd->fdt_blob, "/memory");
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if (offset < 0)
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return -EINVAL;
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val = fdt_getprop(gd->fdt_blob, offset, "reg", &len);
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if (len < sizeof(*val) * 2)
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return -EINVAL;
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/* Use unaligned access since cache is still disabled */
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gd->ram_size = get_unaligned_be64(&val[1]);
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return 0;
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}
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__weak int meson_ft_board_setup(void *blob, struct bd_info *bd)
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{
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return 0;
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}
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int ft_board_setup(void *blob, struct bd_info *bd)
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{
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meson_init_reserved_memory(blob);
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return meson_ft_board_setup(blob, bd);
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}
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void meson_board_add_reserved_memory(void *fdt, u64 start, u64 size)
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{
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int ret;
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ret = fdt_add_mem_rsv(fdt, start, size);
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if (ret)
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printf("Could not reserve zone @ 0x%llx\n", start);
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if (IS_ENABLED(CONFIG_EFI_LOADER))
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efi_add_memory_map(start, size, EFI_RESERVED_MEMORY_TYPE);
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}
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int meson_generate_serial_ethaddr(void)
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{
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u8 mac_addr[ARP_HLEN];
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char serial[SM_SERIAL_SIZE];
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u32 sid;
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u16 sid16;
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if (!meson_sm_get_serial(serial, SM_SERIAL_SIZE)) {
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sid = crc32(0, (unsigned char *)serial, SM_SERIAL_SIZE);
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sid16 = crc16_ccitt(0, (unsigned char *)serial, SM_SERIAL_SIZE);
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/* Ensure the NIC specific bytes of the mac are not all 0 */
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if ((sid & 0xffffff) == 0)
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sid |= 0x800000;
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/* Non OUI / registered MAC address */
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mac_addr[0] = ((sid16 >> 8) & 0xfc) | 0x02;
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mac_addr[1] = (sid16 >> 0) & 0xff;
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mac_addr[2] = (sid >> 24) & 0xff;
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mac_addr[3] = (sid >> 16) & 0xff;
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mac_addr[4] = (sid >> 8) & 0xff;
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mac_addr[5] = (sid >> 0) & 0xff;
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eth_env_set_enetaddr("ethaddr", mac_addr);
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} else
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return -EINVAL;
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return 0;
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}
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static void meson_set_boot_source(void)
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{
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const char *source;
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switch (meson_get_boot_device()) {
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case BOOT_DEVICE_EMMC:
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source = "emmc";
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break;
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case BOOT_DEVICE_NAND:
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source = "nand";
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break;
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case BOOT_DEVICE_SPI:
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source = "spi";
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break;
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case BOOT_DEVICE_SD:
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source = "sd";
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break;
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case BOOT_DEVICE_USB:
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source = "usb";
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break;
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default:
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source = "unknown";
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}
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env_set("boot_source", source);
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}
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__weak int meson_board_late_init(void)
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{
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return 0;
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}
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int board_late_init(void)
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{
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meson_set_boot_source();
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return meson_board_late_init();
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}
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#if CONFIG_IS_ENABLED(FASTBOOT)
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static unsigned int reboot_reason = REBOOT_REASON_NORMAL;
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int fastboot_set_reboot_flag(enum fastboot_reboot_reason reason)
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{
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if (reason != FASTBOOT_REBOOT_REASON_BOOTLOADER)
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return -ENOTSUPP;
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reboot_reason = REBOOT_REASON_BOOTLOADER;
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printf("Using reboot reason: 0x%x\n", reboot_reason);
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return 0;
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}
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void reset_cpu(void)
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{
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struct pt_regs regs;
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regs.regs[0] = ARM_PSCI_0_2_FN_SYSTEM_RESET;
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regs.regs[1] = reboot_reason;
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printf("Rebooting with reason: 0x%lx\n", regs.regs[1]);
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smc_call(®s);
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while (1)
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;
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}
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#else
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void reset_cpu(void)
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{
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psci_system_reset();
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}
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#endif
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