From 1a08f1524d2ee4d4239e56ee1b3f6da0df929563 Mon Sep 17 00:00:00 2001 From: Huacai Chen Date: Fri, 21 Mar 2014 18:44:02 +0800 Subject: 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 Signed-off-by: Hongliang Tao Signed-off-by: Hua Yan Tested-by: Alex Smith Reviewed-by: Alex Smith Cc: John Crispin Cc: Steven J. Hill Cc: Aurelien Jarno Cc: linux-mips@linux-mips.org Cc: Fuxin Zhang Cc: Zhangjin Wu Patchwork: https://patchwork.linux-mips.org/patch/6632 Signed-off-by: Ralf Baechle --- arch/mips/loongson/common/reset.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'arch/mips/loongson/common/reset.c') 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 #include +#include 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) -- cgit v1.2.2