Fábio Coutada
62e8454f91
- make-uefi-iso.sh: UEFI ISO image builder - test_boot.S, test_boot.ld: test boot assembly and linker script - eim_config.toml: EIM (External Interface Module) configuration - edk2-ovmf RPM for UEFI firmware - GAP_ANALYSIS_PIKEOS_PARITY.md: PikeOS parity gap analysis
22 lines
779 B
C
22 lines
779 B
C
#include <stdint.h>
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static void uart_putc(char c) {
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volatile uint32_t* uart = (volatile uint32_t*)0x40004000;
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while (uart[1] & 1);
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uart[0] = c;
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}
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static void uart_puts(const char* s) { while (*s) uart_putc(*s++); }
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void Reset_Handler(void) {
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*(volatile uint32_t*)0xE000ED88 |= (0xF << 20);
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volatile uint32_t* uart = (volatile uint32_t*)0x40004000;
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uart[2] = 0x03;
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*(volatile uint32_t*)0xE000E014 = 24999;
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*(volatile uint32_t*)0xE000E018 = 0;
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*(volatile uint32_t*)0xE000E010 = 7;
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uart_puts("SysTick OK\n");
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for (volatile int i = 0; i < 1000000; i++);
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uart_puts("Done\n");
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for(;;);
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}
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__attribute__((section(".isr_vector")))
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const uint32_t vectors[] = { 0x20080000, (uint32_t)Reset_Handler,
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 };
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