diff options
| author | Huacai Chen <chenhc@lemote.com> | 2014-03-21 18:44:02 +0800 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-03-31 18:17:12 +0200 |
| commit | 1a08f1524d2ee4d4239e56ee1b3f6da0df929563 (patch) | |
| tree | 35e14776ea58a8a99c491479dcd12e0a07cbe256 /arch/mips/loongson/common/reset.c | |
| parent | 5f6d693ebb4993c49a0d150da1c5fff15867fec0 (diff) | |
MIPS: Loongson: Add UEFI-like firmware interface (LEFI) support
The new UEFI-like firmware interface (LEFI, i.e. Loongson Unified
Firmware Interface) has 3 advantages:
1, Firmware export a physical memory map which is similar to X86's
E820 map, so prom_init_memory() will be more elegant that #ifdef
clauses can be removed.
2, Firmware export a pci irq routing table, we no longer need pci
irq routing fixup in kernel's code.
3, Firmware has a built-in vga bios, and its address is exported,
the linux kernel no longer need an embedded blob.
With the LEFI interface, Loongson-3A/2G and all their successors can use
a unified kernel. All Loongson-based machines support this new interface
except 2E/2F series.
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Signed-off-by: Hongliang Tao <taohl@lemote.com>
Signed-off-by: Hua Yan <yanh@lemote.com>
Tested-by: Alex Smith <alex.smith@imgtec.com>
Reviewed-by: Alex Smith <alex.smith@imgtec.com>
Cc: John Crispin <john@phrozen.org>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: linux-mips@linux-mips.org
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/6632
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/loongson/common/reset.c')
| -rw-r--r-- | arch/mips/loongson/common/reset.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/mips/loongson/common/reset.c b/arch/mips/loongson/common/reset.c index 65bfbb5d06f4..a60715e11306 100644 --- a/arch/mips/loongson/common/reset.c +++ b/arch/mips/loongson/common/reset.c @@ -16,6 +16,7 @@ #include <asm/reboot.h> #include <loongson.h> +#include <boot_param.h> static inline void loongson_reboot(void) { @@ -37,17 +38,37 @@ static inline void loongson_reboot(void) static void loongson_restart(char *command) { +#ifndef CONFIG_LEFI_FIRMWARE_INTERFACE /* do preparation for reboot */ mach_prepare_reboot(); /* reboot via jumping to boot base address */ loongson_reboot(); +#else + void (*fw_restart)(void) = (void *)loongson_sysconf.restart_addr; + + fw_restart(); + while (1) { + if (cpu_wait) + cpu_wait(); + } +#endif } static void loongson_poweroff(void) { +#ifndef CONFIG_LEFI_FIRMWARE_INTERFACE mach_prepare_shutdown(); unreachable(); +#else + void (*fw_poweroff)(void) = (void *)loongson_sysconf.poweroff_addr; + + fw_poweroff(); + while (1) { + if (cpu_wait) + cpu_wait(); + } +#endif } static void loongson_halt(void) |