112 lines
4.4 KiB
C
112 lines
4.4 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 path.
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*/
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#include <dma.h>
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/* ─── UART 16550 direct access (bypasses slow printf/picolibc) ──────── */
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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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while (!(UART_LSR & LSR_THRE)) {}
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UART_THR = c;
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}
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static void uart_puts(const char *s) {
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while (*s) uart_tx(*s++);
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}
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static void uart_puthex(unsigned int val) {
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int i;
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for (i = 28; i >= 0; i -= 4) {
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unsigned char nibble = (val >> i) & 0xF;
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uart_tx(nibble < 10 ? '0' + nibble : 'a' + nibble - 10);
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}
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}
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/* ─── Configurable group count (default 5000) ──────────────────────── */
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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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/* ─── BSP globals ─────────────────────────────────────────────────── */
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unsigned long UART_BASE = 0xbf000000;
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/* ─── Memory layout ────────────────────────────────────────────────── */
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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 DST_BASE_WORDS (SRC_BASE_WORDS + MATMUL_GROUP_NUM * 32)
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#define RESULT_WORDS (MATMUL_GROUP_NUM * 48)
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/* ExtRAM Physical Addresses for DMA */
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#define EXTRAM_PHYS_AB(g) (EXTRAM_BASE_PHYS + (SRC_BASE_WORDS * 4) + (g) * 128)
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#define EXTRAM_PHYS_C(g) (EXTRAM_BASE_PHYS + (DST_BASE_WORDS * 4) + (g) * 192)
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/* ─── MATMUL IP registers (Ping-Pong Memory Map) ──────────────────── */
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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_DST_BASE (MATMUL_BASE_UNCACHED + 0x024)
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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_DST_STRIDE (MATMUL_BASE_UNCACHED + 0x030)
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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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/* ─── Pre-computed DMA burst control word ──────────────────────────── */
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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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/* ═══════════════════════════════════════════════════════════════════ */
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int main(void)
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{
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if (MATMUL_GROUP_NUM <= 0) return 0;
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/* ── Hot-path local volatile pointers (one-time addr calc) ──────── */
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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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/* ── Start marker (must be first output) ──────────────────── */
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uart_puts("MATMUL_START\r\n");
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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_DST_BASE = EXTRAM_PHYS_C(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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*(volatile unsigned int *)MATMUL_DMA_DST_STRIDE = 192;
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*mat_ctrl = CTRL_DMA_START;
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while (!(*mat_status & STATUS_DMA_DONE)) {}
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*mat_status = STATUS_DMA_DONE;
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/* ── Read hardware CRC32 ──────────────────────────────────── */
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crc = *mat_crc;
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uart_puts("MATMUL_CRC32=");
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uart_puthex(crc);
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uart_puts("\r\nMATMUL_DONE\r\n");
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return 0;
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}
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