55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
/* See LICENSE of license details. */
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#include "platform.h"
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#include "stub.h"
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#include "weak_under_alias.h"
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#include <errno.h>
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#include <stdint.h>
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#include <sys/types.h>
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#include <unistd.h>
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ssize_t __wrap_read(int fd, void *ptr, size_t len) {
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uint8_t *current = (uint8_t *)ptr;
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#if defined(BOARD_hifive1)
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volatile uint32_t *uart_rx = (uint32_t *)(UART0_CTRL_ADDR + UART_REG_RXFIFO);
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volatile uint8_t *uart_rx_cnt =
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(uint8_t *)(UART0_CTRL_ADDR + UART_REG_RXCTRL + 2);
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#elif defined(BOARD_iss)
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volatile uint32_t *uart_rx = (uint32_t *)0xFFFF0000;
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#elif defined(BOARD_TGCP)
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// TODO: implement
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#elif !defined(BOARD_ehrenberg) && !defined(BOARD_tgc_vp)
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volatile uint32_t *uart_rx = (uint32_t *)(UART0_BASE_ADDR + UART_REG_RXFIFO);
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volatile uint8_t *uart_rx_cnt =
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(uint8_t *)(UART0_BASE_ADDR + UART_REG_RXCTRL + 2);
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#endif
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ssize_t result = 0;
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if (isatty(fd)) {
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#if defined(BOARD_ehrenberg) || defined(BOARD_tgc_vp)
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for (current = (uint8_t *)ptr; (current < ((uint8_t *)ptr) + len) &&
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(get_uart_rx_tx_reg_rx_avail(uart) > 0);
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current++) {
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*current = uart_read(uart);
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result++;
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}
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#elif defined(BOARD_iss)
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for (current = (uint8_t *)ptr; (current < ((uint8_t *)ptr) + len);
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current++) {
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*current = *uart_rx;
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result++;
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}
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#elif defined(BOARD_TGCP)
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// TODO: implement
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#else
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for (current = (uint8_t *)ptr;
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(current < ((uint8_t *)ptr) + len) && (*uart_rx_cnt > 0); current++) {
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*current = *uart_rx;
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result++;
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}
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#endif
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return result;
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}
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return _stub(EBADF);
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}
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weak_under_alias(read);
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