172 lines
2.7 KiB
C
172 lines
2.7 KiB
C
/*
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* Copyright (C) 2022 - Tillitis AB
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* SPDX-License-Identifier: GPL-2.0-only
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*/
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#include "lib.h"
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#include "types.h"
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#if NOCONSOLE
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void putc(int ch)
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{
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}
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void lf()
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{
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}
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void puthex(uint8_t c)
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{
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}
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void putinthex(const uint32_t n)
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{
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}
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int puts(const char *s)
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{
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return 0;
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}
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void hexdump(uint8_t *buf, int len)
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{
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}
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#else
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struct {
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uint32_t arr[2];
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} volatile tohost __attribute__((section(".htif")));
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struct {
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uint32_t arr[2];
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} volatile fromhost __attribute__((section(".htif")));
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static void htif_send(uint8_t dev, uint8_t cmd, int64_t data)
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{
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/* endian neutral encoding with ordered 32-bit writes */
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union {
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uint32_t arr[2];
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uint64_t val;
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} encode = {.val = (uint64_t)dev << 56 | (uint64_t)cmd << 48 | data};
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tohost.arr[0] = encode.arr[0];
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tohost.arr[1] = encode.arr[1];
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}
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static void htif_set_tohost(uint8_t dev, uint8_t cmd, int64_t data)
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{
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/* send data with specified device and command */
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while (tohost.arr[0]) {
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asm volatile("" : : "r"(fromhost.arr[0]));
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asm volatile("" : : "r"(fromhost.arr[1]));
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}
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htif_send(dev, cmd, data);
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}
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static int htif_putchar(int ch)
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{
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htif_set_tohost(1, 1, ch & 0xff);
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return ch & 0xff;
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}
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int puts(const char *s)
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{
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while (*s)
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htif_putchar(*s++);
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return 0;
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}
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void hexdump(uint8_t *buf, int len)
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{
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uint8_t *row;
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uint8_t *byte;
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uint8_t *max;
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row = buf;
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max = &buf[len];
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for (byte = 0; byte != max; row = byte) {
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for (byte = row; byte != max && byte != (row + 16); byte++) {
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puthex(*byte);
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}
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lf();
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}
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}
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void putc(int ch)
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{
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htif_putchar(ch);
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}
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void lf()
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{
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htif_putchar('\n');
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}
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void puthex(uint8_t c)
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{
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unsigned int upper = (c >> 4) & 0xf;
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unsigned int lower = c & 0xf;
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htif_putchar(upper < 10 ? '0' + upper : 'a' - 10 + upper);
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htif_putchar(lower < 10 ? '0' + lower : 'a' - 10 + lower);
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}
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void putinthex(const uint32_t n)
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{
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uint8_t buf[4];
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memcpy(buf, &n, 4);
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puts("0x");
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for (int i = 3; i > -1; i--) {
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puthex(buf[i]);
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}
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}
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#endif
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void *memset(void *dest, int c, unsigned n)
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{
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uint8_t *s = dest;
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for (; n; n--, s++)
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*s = c;
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return dest;
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}
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__attribute__((used)) void *memcpy(void *dest, const void *src, unsigned n)
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{
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uint8_t *src_byte = (uint8_t *)src;
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uint8_t *dest_byte = (uint8_t *)dest;
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for (int i = 0; i < n; i++) {
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dest_byte[i] = src_byte[i];
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}
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return dest;
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}
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__attribute__((used)) void *wordcpy(void *dest, const void *src, unsigned n)
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{
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uint32_t *src_word = (uint32_t *)src;
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uint32_t *dest_word = (uint32_t *)dest;
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for (int i = 0; i < n; i++) {
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dest_word[i] = src_word[i];
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}
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return dest;
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}
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int memeq(void *dest, const void *src, unsigned n)
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{
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uint8_t *src_byte = (uint8_t *)src;
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uint8_t *dest_byte = (uint8_t *)dest;
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for (int i = 0; i < n; i++) {
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if (dest_byte[i] != src_byte[i]) {
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return 0;
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}
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}
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return -1;
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}
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