160 lines
4.0 KiB
C
160 lines
4.0 KiB
C
/**
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* user-sample - CIC-IEC 2026 Stage 3 Evaluation Program
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*
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* Matmul AXI-master CRC-only path with fast startup and low-overhead UART output.
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*/
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#include <dma.h>
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#define UART_THR (*(volatile unsigned char *)0xbf000000)
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#define UART_LSR (*(volatile unsigned char *)0xbf000005)
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#define LSR_THRE 0x20
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static inline void uart_tx(unsigned char c)
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{
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while ((UART_LSR & LSR_THRE) == 0) {
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}
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UART_THR = c;
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}
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static void uart_put_matmul_start_fifo(void)
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{
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UART_THR = 'M';
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UART_THR = 'A';
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UART_THR = 'T';
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UART_THR = 'M';
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UART_THR = 'U';
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UART_THR = 'L';
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UART_THR = '_';
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UART_THR = 'S';
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UART_THR = 'T';
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UART_THR = 'A';
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UART_THR = 'R';
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UART_THR = 'T';
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}
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static void uart_put_crc_prefix_fifo(void)
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{
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UART_THR = 'M';
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UART_THR = 'A';
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UART_THR = 'T';
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UART_THR = 'M';
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UART_THR = 'U';
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UART_THR = 'L';
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UART_THR = '_';
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UART_THR = 'C';
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UART_THR = 'R';
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UART_THR = 'C';
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UART_THR = '3';
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UART_THR = '2';
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UART_THR = '=';
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}
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static inline void uart_wait_tx_empty(void)
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{
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while ((UART_LSR & LSR_THRE) == 0) {
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}
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}
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static inline unsigned char hex_digit(unsigned int val, int shift)
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{
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unsigned char nibble = (unsigned char)((val >> shift) & 0xf);
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return (unsigned char)(nibble < 10 ? ('0' + nibble) : ('a' + nibble - 10));
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}
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static void uart_put_result_fifo(unsigned int crc)
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{
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uart_wait_tx_empty();
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UART_THR = hex_digit(crc, 28);
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UART_THR = hex_digit(crc, 24);
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UART_THR = hex_digit(crc, 20);
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UART_THR = hex_digit(crc, 16);
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UART_THR = hex_digit(crc, 12);
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UART_THR = hex_digit(crc, 8);
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UART_THR = hex_digit(crc, 4);
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UART_THR = hex_digit(crc, 0);
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UART_THR = 'M';
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UART_THR = 'A';
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UART_THR = 'T';
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UART_THR = 'M';
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UART_THR = 'U';
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UART_THR = 'L';
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UART_THR = '_';
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UART_THR = 'D';
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UART_THR = 'O';
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UART_THR = 'N';
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UART_THR = 'E';
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}
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#ifndef MATMUL_GROUP_NUM
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#define MATMUL_GROUP_NUM 5000
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#endif
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#if MATMUL_FAST_START == 0
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unsigned long UART_BASE = 0xbf000000;
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#endif
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#define EXTRAM_BASE_PHYS 0x1c400000
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#define EXTRAM_BASE_UNCACHED (0xA0000000 | (EXTRAM_BASE_PHYS & 0x1FFFFFFF))
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#define SRC_BASE_WORDS 0
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#define EXTRAM_PHYS_AB(g) (EXTRAM_BASE_PHYS + (SRC_BASE_WORDS * 4) + (g) * 128)
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#define MATMUL_BASE_PHYS 0x1f500000
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#define MATMUL_BASE_UNCACHED 0xbf500000
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#define MATMUL_CTRL (MATMUL_BASE_UNCACHED + 0x000)
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#define MATMUL_STATUS (MATMUL_BASE_UNCACHED + 0x004)
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#define MATMUL_DMA_SRC_BASE (MATMUL_BASE_UNCACHED + 0x020)
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#define MATMUL_DMA_GROUPS (MATMUL_BASE_UNCACHED + 0x028)
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#define MATMUL_DMA_SRC_STRIDE (MATMUL_BASE_UNCACHED + 0x02C)
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#define MATMUL_DMA_CYCLES (MATMUL_BASE_UNCACHED + 0x034)
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#define CTRL_START_B0 0x1
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#define CTRL_START_B1 0x2
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#define CTRL_DMA_START (1 << 8)
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#define STATUS_DONE 0x2
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#define STATUS_ERROR 0x4
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#define STATUS_DMA_BUSY (1 << 3)
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#define STATUS_DMA_DONE (1 << 4)
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#define MATMUL_CRC (MATMUL_BASE_UNCACHED + 0x010)
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#define DMA_CTRL_VAL (CTRL_BURST_SIZE(2) | CTRL_BURST_LEN(63) | CTRL_START_BIT)
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#define MATMUL_EP_ID 0
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volatile unsigned int matmul_dma_cycles;
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int main(void)
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{
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if (MATMUL_GROUP_NUM <= 0) {
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return 0;
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}
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volatile unsigned int *mat_ctrl = (volatile unsigned int *)MATMUL_CTRL;
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volatile unsigned int *mat_status = (volatile unsigned int *)MATMUL_STATUS;
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volatile unsigned int *mat_crc = (volatile unsigned int *)MATMUL_CRC;
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unsigned int crc;
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uart_put_matmul_start_fifo();
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*(volatile unsigned int *)MATMUL_CRC = 0;
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*mat_status = STATUS_DMA_DONE | STATUS_DONE | STATUS_ERROR;
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*(volatile unsigned int *)MATMUL_DMA_SRC_BASE = EXTRAM_PHYS_AB(0);
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*(volatile unsigned int *)MATMUL_DMA_GROUPS = MATMUL_GROUP_NUM;
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*(volatile unsigned int *)MATMUL_DMA_SRC_STRIDE = 128;
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*mat_ctrl = CTRL_DMA_START;
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uart_put_crc_prefix_fifo();
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while (!(*mat_status & STATUS_DMA_DONE)) {}
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matmul_dma_cycles = *(volatile unsigned int *)MATMUL_DMA_CYCLES;
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*mat_status = STATUS_DMA_DONE;
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crc = *mat_crc;
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uart_put_result_fifo(crc);
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return 0;
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}
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