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// 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! */
raw_local_irq_enable();
cpu_do_idle();
raw_local_irq_disable();
}
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
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