8c44d12357
Boots under QEMU on all three ISAs from one clang build: - shared C core (kmain, console) calls a small per-arch contract (arch.h) - per-arch asm entry + trap/vector table + UART driver - parallel Makefile (make -j), 'make run-<arch>', 'make sizes' M1 = boot, UART up, trap vector installed, banner from kmain().
27 lines
594 B
C
27 lines
594 B
C
/* console.c — portable text output built on arch_uart_putc().
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* No libc: we implement the tiny bit of formatting we need. */
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#include "arch.h"
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#include "console.h"
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void putc(char c)
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{
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if (c == '\n')
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arch_uart_putc('\r'); /* CRLF for dumb terminals */
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arch_uart_putc(c);
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}
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void puts(const char *s)
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{
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while (*s)
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putc(*s++);
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}
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/* Minimal unsigned hex printer — enough to show addresses/registers. */
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void puthex(unsigned long v)
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{
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static const char d[] = "0123456789abcdef";
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int i;
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puts("0x");
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for (i = (int)(sizeof(v) * 2) - 1; i >= 0; i--)
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putc(d[(v >> (i * 4)) & 0xf]);
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}
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