mirror of
https://github.com/openhwgroup/cvw
synced 2025-01-23 21:14:37 +00:00
79 lines
2.2 KiB
C
79 lines
2.2 KiB
C
#include <stddef.h>
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#include "boot.h"
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#include "gpt.h"
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#include "uart.h"
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#include "spi.h"
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#include "sd.h"
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/* int disk_read(BYTE * buf, LBA_t sector, UINT count, BYTE card_type) { */
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/* /\* This is not needed. This has everything to do with the FAT */
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/* filesystem stuff that I'm not including. All I need to do is */
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/* initialize the SD card and read from it. Anything in here that is */
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/* checking for potential errors, I'm going to have to temporarily */
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/* do without. */
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/* *\/ */
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/* // if (!count) return RES_PARERR; */
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/* /\* if (drv_status & STA_NOINIT) return RES_NOTRDY; *\/ */
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/* uint32_t response[4]; */
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/* struct sdc_regs * regs = (struct sdc_regs *)SDC; */
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/* /\* Convert LBA to byte address if needed *\/ */
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/* if (!(card_type & CT_BLOCK)) sector *= 512; */
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/* while (count > 0) { */
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/* UINT bcnt = count > MAX_BLOCK_CNT ? MAX_BLOCK_CNT : count; */
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/* unsigned bytes = bcnt * 512; */
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/* if (send_data_cmd(bcnt == 1 ? CMD17 : CMD18, sector, buf, bcnt, response) < 0) return 1; */
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/* if (bcnt > 1 && send_cmd(CMD12, 0, response) < 0) return 1; */
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/* sector += (card_type & CT_BLOCK) ? bcnt : bytes; */
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/* count -= bcnt; */
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/* buf += bytes; */
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/* } */
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/* return 0;; */
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/* } */
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int disk_read(BYTE * buf, LBA_t sector, UINT count) {
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uint64_t r;
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UINT i;
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uint8_t crc = 0;
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crc = crc7(crc, 0x40 | SD_CMD_READ_BLOCK_MULTIPLE);
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crc = crc7(crc, (sector >> 24) & 0xff);
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crc = crc7(crc, (sector >> 16) & 0xff);
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crc = crc7(crc, (sector >> 8) & 0xff);
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crc = crc7(crc, sector & 0xff);
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crc = crc | 1;
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if (sd_cmd(18, sector &, crc) != 0x00) {
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print_uart("disk_read: CMD18 failed. r = ");
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print_byte(r & 0xff);
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return -1;
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}
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// Begin reading
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for (i = 0; i < count; i++) {
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}
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}
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// copyFlash: --------------------------------------------------------
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// A lot happens in this function:
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// * The Wally banner is printed
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// * The peripherals are initialized
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void copyFlash(QWORD address, QWORD * Dst, DWORD numBlocks) {
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int ret = 0;
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// Initialize UART for messages
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init_uart();
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// Print the wally banner
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print_uart(BANNER);
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// Intialize the SD card
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init_sd();
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ret = gpt_load_partitions(card_type);
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}
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