65 lines
1.4 KiB
C
65 lines
1.4 KiB
C
#include "boot.h"
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#include "image.h"
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typedef unsigned long u64;
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#define INIT_STACK_SIZE 0x1000
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char boot_cpu_stack[PLAT_CPU_NUMBER][INIT_STACK_SIZE] ALIGN(16);
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/*
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* Initialize these varibles in order to make them not in .bss section.
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* So, they will have concrete initial value even on real machine.
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*
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* Non-primary CPUs will spin until they see the secondary_boot_flag becomes
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* non-zero which is set in kernel (see enable_smp_cores).
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*
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* The secondary_boot_flag is initilized as {NOT_BSS, 0, 0, ...}.
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*/
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#define NOT_BSS (0xBEEFUL)
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long secondary_boot_flag[PLAT_CPU_NUMBER] = { NOT_BSS };
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volatile u64 clear_bss_flag = NOT_BSS;
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/* Uart */
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void early_uart_init(void);
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void uart_send_string(char *);
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static void clear_bss(void)
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{
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u64 bss_start_addr;
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u64 bss_end_addr;
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u64 i;
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bss_start_addr = (u64) & _bss_start;
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bss_end_addr = (u64) & _bss_end;
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for (i = bss_start_addr; i < bss_end_addr; ++i)
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*(char *)i = 0;
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clear_bss_flag = 0;
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}
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void init_c(void)
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{
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/* Clear the bss area for the kernel image */
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clear_bss();
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/* Initialize UART before enabling MMU. */
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early_uart_init();
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uart_send_string("boot: init_c\r\n");
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/* Initialize Boot Page Table. */
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uart_send_string("[BOOT] Install boot page table\r\n");
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init_boot_pt();
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/* Enable MMU. */
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el1_mmu_activate();
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uart_send_string("[BOOT] Enable el1 MMU\r\n");
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/* Call Kernel Main. */
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uart_send_string("[BOOT] Jump to kernel main\r\n");
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start_kernel(secondary_boot_flag);
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/* Never reach here */
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}
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