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