文件：init/main.c
start_kernel
==> setup_arch(&command_line);
文件：arch/arm/kernel/setup.c
setup_arch
==> paging_init(mdesc);
文件：arch/arm/mm/mmu.c
==> paging_init
==> devicemaps_init(mdesc);
if (mdesc->map_io)
mdesc->map_io();
MACHINE_START(EDB9312, "Cirrus Logic EDB9312 Evaluation Board")
/* Maintainer: Toufeeq Hussain */
.phys_io = EP93XX_APB_PHYS_BASE,
.io_pg_offst = ((EP93XX_APB_VIRT_BASE) >> 18) & 0xfffc,
.boot_params = EP93XX_SDCE3_PHYS_BASE_SYNC + 0x100,
.map_io = ep93xx_map_io,[luther.gliethttp]
.init_irq = ep93xx_init_irq,
.timer = &ep93xx_timer,
.init_machine = edb9312_init_machine,
MACHINE_END
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