| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Gemini Device Tree boot support |
| */ |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/io.h> |
| |
| #include <asm/mach/arch.h> |
| #include <asm/mach/map.h> |
| #include <asm/system_misc.h> |
| #include <asm/proc-fns.h> |
| |
| #ifdef CONFIG_DEBUG_GEMINI |
| /* This is needed for LL-debug/earlyprintk/debug-macro.S */ |
| static struct map_desc gemini_io_desc[] __initdata = { |
| { |
| .virtual = CONFIG_DEBUG_UART_VIRT, |
| .pfn = __phys_to_pfn(CONFIG_DEBUG_UART_PHYS), |
| .length = SZ_4K, |
| .type = MT_DEVICE, |
| }, |
| }; |
| |
| static void __init gemini_map_io(void) |
| { |
| iotable_init(gemini_io_desc, ARRAY_SIZE(gemini_io_desc)); |
| } |
| #else |
| #define gemini_map_io NULL |
| #endif |
| |
| static void gemini_idle(void) |
| { |
| /* |
| * Because of broken hardware we have to enable interrupts or the CPU |
| * will never wakeup... Acctualy it is not very good to enable |
| * interrupts first since scheduler can miss a tick, but there is |
| * no other way around this. Platforms that needs it for power saving |
| * should enable it in init code, since by default it is |
| * disabled. |
| */ |
| |
| /* FIXME: Enabling interrupts here is racy! */ |
| local_irq_enable(); |
| cpu_do_idle(); |
| } |
| |
| static void __init gemini_init_machine(void) |
| { |
| arm_pm_idle = gemini_idle; |
| } |
| |
| static const char *gemini_board_compat[] = { |
| "cortina,gemini", |
| NULL, |
| }; |
| |
| DT_MACHINE_START(GEMINI_DT, "Gemini (Device Tree)") |
| .map_io = gemini_map_io, |
| .init_machine = gemini_init_machine, |
| .dt_compat = gemini_board_compat, |
| MACHINE_END |