adds RISCV-VP platform

env/riscv_vp/platform.h

@@ -0,0 +1,48 @@
+// See LICENSE for license details.
+
+#ifndef _ISS_PLATFORM_H
+#define _ISS_PLATFORM_H
+
+#if __riscv_xlen == 32
+#define MCAUSE_INT 0x80000000UL
+#define MCAUSE_CAUSE 0x000003FFUL
+#else
+#define MCAUSE_INT 0x8000000000000000UL
+#define MCAUSE_CAUSE 0x00000000000003FFUL
+#endif
+
+#define APB_BUS
+
+#include "minres/devices/aclint.h"
+#include "minres/devices/dma.h"
+#include "minres/devices/gen/sysctrl.h"
+#include "minres/devices/gpio.h"
+#include "minres/devices/i2s.h"
+#include "minres/devices/qspi.h"
+#include "minres/devices/timer.h"
+#include "minres/devices/uart.h"
+
+#define PERIPH(TYPE, ADDR) ((volatile TYPE*)(ADDR))
+// values from memory_map.ld
+#define XIP_START_LOC 0x30000000
+#define RAM_START_LOC 0x00000000
+#define APB_BASE 0x10000000
+
+#define gpio PERIPH(gpio_t, APB_BASE + 0x0000)
+#define uart PERIPH(uart_t, APB_BASE + 0x01000)
+#define timer PERIPH(timercounter_t, APB_BASE + 0x20000)
+#define aclint PERIPH(aclint_t, APB_BASE + 0x30000)
+#define sysctrl PERIPH(sysctrl_t, APB_BASE + 0x40000)
+#define qspi PERIPH(qspi_t, APB_BASE + 0x50000)
+#define i2s PERIPH(i2s_t, APB_BASE + 0x90000)
+#define dma PERIPH(dma_t, APB_BASE + 0xB0000)
+
+// Misc
+
+#include <stdint.h>
+
+void init_pll(void);
+unsigned long get_cpu_freq(void);
+unsigned long get_timer_freq(void);
+
+#endif /* _ISS_PLATFORM_H */