fomu: initial commit

Signed-off-by: Sean Cross <sean@xobs.io>

hw/bsp/fomu/board.mk

@@ -0,0 +1,29 @@
+CFLAGS += \
+  -march=rv32i \
+  -mabi=ilp32 \
+  -nostdlib \
+  -DCFG_TUSB_MCU=OPT_MCU_FOMU_EPTRI
+
+MCU_DIR = hw/mcu/fomu
+BSP_DIR = hw/bsp/fomu
+
+# All source paths should be relative to the top level.
+LD_FILE = hw/bsp/fomu/fomu.ld
+
+# TODO remove later
+SRC_C += src/portable/$(VENDOR)/$(CHIP_FAMILY)/hal_$(CHIP_FAMILY).c
+
+SRC_C += 
+
+SRC_S += hw/bsp/fomu/crt0-vexriscv.S
+
+INC += \
+	$(TOP)/$(BSP_DIR)/include
+
+# For TinyUSB port source
+VENDOR = foosn
+CHIP_FAMILY = fomu
+
+# flash using dfu-util
+flash: $(BUILD)/$(BOARD)-firmware.dfu
+	dfu-util -D $^

hw/bsp/fomu/bsp.c

@@ -0,0 +1,129 @@
+/* 
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * This file is part of the TinyUSB stack.
+ */
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "common/tusb_common.h"
+#include "csr.h"
+#include "irq.h"
+
+//--------------------------------------------------------------------+
+// Board porting API
+//--------------------------------------------------------------------+
+
+void hal_dcd_isr(uint8_t rhport);
+
+void mputs(const char *str) {
+  (void)str;
+  while (*str) {
+    if (! (messible_status_read() & CSR_MESSIBLE_STATUS_FULL_OFFSET))
+      messible_in_write(*str);
+    str++;
+  }
+}
+
+void mputln(const char *str) {
+  mputs(str);
+  mputs("\n");
+}
+
+void fomu_error(uint32_t line)
+{
+  (void)line;
+  TU_BREAKPOINT();
+  while (1) {}
+}
+
+volatile uint32_t system_ticks = 0;
+static void timer_init(void)
+{
+	int t;
+
+	timer0_en_write(0);
+	t = CONFIG_CLOCK_FREQUENCY / 1000; // 1000 kHz tick
+	timer0_reload_write(t);
+	timer0_load_write(t);
+	timer0_en_write(1);
+  timer0_ev_enable_write(1);
+  timer0_ev_pending_write(1);
+	irq_setmask(irq_getmask() | (1 << TIMER0_INTERRUPT));
+}
+
+void isr(void)
+{
+  unsigned int irqs;
+
+  irqs = irq_pending() & irq_getmask();
+
+  if (irqs & (1 << USB_INTERRUPT)) {
+    hal_dcd_isr(0);
+  }
+  if (irqs & (1 << TIMER0_INTERRUPT)) {
+    system_ticks++;
+    timer0_ev_pending_write(1);
+  }
+}
+
+void board_init(void)
+{
+  mputln("Fomu Initializing");
+  irq_setmask(0);
+  irq_setie(1);
+  timer_init();
+  return;
+}
+
+void board_led_write(bool state)
+{
+  rgb_ctrl_write(0xff);
+  rgb_raw_write(state);
+}
+
+uint32_t board_button_read(void)
+{
+  return 0;
+}
+
+int board_uart_read(uint8_t* buf, int len)
+{
+  (void) buf;
+  (void) len;
+  return 0;
+}
+
+int board_uart_write(void const * buf, int len)
+{
+  (void) buf;
+  (void) len;
+  return 0;
+}
+
+#if CFG_TUSB_OS == OPT_OS_NONE
+uint32_t board_millis(void)
+{
+  return system_ticks;
+}
+#endif

hw/bsp/fomu/crt0-vexriscv.S

@@ -0,0 +1,91 @@
+.global main
+.global isr
+
+.section .text.start
+.global _start
+
+_start:
+  j crt_init
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+
+.section .text
+.global  trap_entry
+trap_entry:
+  sw x1,  - 1*4(sp)
+  sw x5,  - 2*4(sp)
+  sw x6,  - 3*4(sp)
+  sw x7,  - 4*4(sp)
+  sw x10, - 5*4(sp)
+  sw x11, - 6*4(sp)
+  sw x12, - 7*4(sp)
+  sw x13, - 8*4(sp)
+  sw x14, - 9*4(sp)
+  sw x15, -10*4(sp)
+  sw x16, -11*4(sp)
+  sw x17, -12*4(sp)
+  sw x28, -13*4(sp)
+  sw x29, -14*4(sp)
+  sw x30, -15*4(sp)
+  sw x31, -16*4(sp)
+  addi sp,sp,-16*4
+  call isr
+  lw x1 , 15*4(sp)
+  lw x5,  14*4(sp)
+  lw x6,  13*4(sp)
+  lw x7,  12*4(sp)
+  lw x10, 11*4(sp)
+  lw x11, 10*4(sp)
+  lw x12,  9*4(sp)
+  lw x13,  8*4(sp)
+  lw x14,  7*4(sp)
+  lw x15,  6*4(sp)
+  lw x16,  5*4(sp)
+  lw x17,  4*4(sp)
+  lw x28,  3*4(sp)
+  lw x29,  2*4(sp)
+  lw x30,  1*4(sp)
+  lw x31,  0*4(sp)
+  addi sp,sp,16*4
+  mret
+  .text
+
+
+crt_init:
+  la sp, _fstack + 4
+  la a0, trap_entry
+  csrw mtvec, a0
+
+bss_init:
+  la a0, _fbss
+  la a1, _ebss
+bss_loop:
+  beq a0,a1,bss_done
+  sw zero,0(a0)
+  add a0,a0,4
+  j bss_loop
+bss_done:
+
+  /* Load DATA */
+  la t0, _erodata
+  la t1, _fdata
+  la t2, _edata
+3:
+  lw t3, 0(t0)
+  sw t3, 0(t1)
+  /* _edata is aligned to 16 bytes. Use word-xfers. */
+  addi t0, t0, 4
+  addi t1, t1, 4
+  bltu t1, t2, 3b
+
+  li a0, 0x880  //880 enable timer + external interrupt sources (until mstatus.MIE is set, they will never trigger an interrupt)
+  csrw mie,a0
+
+  call main
+infinit_loop:
+  j infinit_loop

hw/bsp/fomu/fomu.ld

@@ -0,0 +1,61 @@
+OUTPUT_FORMAT("elf32-littleriscv")
+ENTRY(_start)
+
+__DYNAMIC = 0;
+
+MEMORY {
+	csr : ORIGIN = 0x60000000, LENGTH = 0x01000000
+	vexriscv_debug : ORIGIN = 0xf00f0000, LENGTH = 0x00000100
+	sram : ORIGIN = 0x10000000, LENGTH = 0x00020000
+	rom : ORIGIN = 0x2001a000, LENGTH = 0x00200000 - 0x1a000
+}
+
+SECTIONS
+{
+	.text :
+	{
+		_ftext = .;
+		*(.text.start)
+		*(.text .stub .text.* .gnu.linkonce.t.*)
+		_etext = .;
+	} > rom
+
+	.rodata :
+	{
+		. = ALIGN(4);
+		_frodata = .;
+		*(.rodata .rodata.* .gnu.linkonce.r.*)
+		*(.rodata1)
+		*(.srodata)
+		_erodata = .;
+	} > rom
+
+	.data : AT (ADDR(.rodata) + SIZEOF (.rodata))
+	{
+		. = ALIGN(4);
+		_fdata = .;
+		*(.data .data.* .gnu.linkonce.d.*)
+		*(.data1)
+		_gp = ALIGN(16);
+		*(.sdata .sdata.* .gnu.linkonce.s.* .sdata2 .sdata2.*)
+		_edata = ALIGN(16); /* Make sure _edata is >= _gp. */
+	} > sram
+
+	.bss :
+	{
+		. = ALIGN(4);
+		_fbss = .;
+		*(.dynsbss)
+		*(.sbss .sbss.* .gnu.linkonce.sb.*)
+		*(.scommon)
+		*(.dynbss)
+		*(.bss .bss.* .gnu.linkonce.b.*)
+		*(COMMON)
+		. = ALIGN(4);
+		_ebss = .;
+		_end = .;
+        PROVIDE(end = .);
+	} > sram
+}
+
+PROVIDE(_fstack = ORIGIN(sram) + LENGTH(sram) - 4);

hw/bsp/fomu/include/csr.h

@@ -0,0 +1,709 @@
+//--------------------------------------------------------------------------------
+// Auto-generated by Migen (f4fcd10) & LiteX (1425a68d) on 2019-10-11 22:01:17
+//--------------------------------------------------------------------------------
+#ifndef __GENERATED_CSR_H
+#define __GENERATED_CSR_H
+#include <stdint.h>
+#ifdef CSR_ACCESSORS_DEFINED
+extern void csr_writeb(uint8_t value, unsigned long addr);
+extern uint8_t csr_readb(unsigned long addr);
+extern void csr_writew(uint16_t value, unsigned long addr);
+extern uint16_t csr_readw(unsigned long addr);
+extern void csr_writel(uint32_t value, unsigned long addr);
+extern uint32_t csr_readl(unsigned long addr);
+#else /* ! CSR_ACCESSORS_DEFINED */
+#include <hw/common.h>
+#endif /* ! CSR_ACCESSORS_DEFINED */
+
+/* ctrl */
+#define CSR_CTRL_BASE 0xe0000000L
+#define CSR_CTRL_RESET_ADDR 0xe0000000L
+#define CSR_CTRL_RESET_SIZE 1
+static inline unsigned char ctrl_reset_read(void) {
+	unsigned char r = csr_readl(0xe0000000L);
+	return r;
+}
+static inline void ctrl_reset_write(unsigned char value) {
+	csr_writel(value, 0xe0000000L);
+}
+#define CSR_CTRL_SCRATCH_ADDR 0xe0000004L
+#define CSR_CTRL_SCRATCH_SIZE 4
+static inline unsigned int ctrl_scratch_read(void) {
+	unsigned int r = csr_readl(0xe0000004L);
+	r <<= 8;
+	r |= csr_readl(0xe0000008L);
+	r <<= 8;
+	r |= csr_readl(0xe000000cL);
+	r <<= 8;
+	r |= csr_readl(0xe0000010L);
+	return r;
+}
+static inline void ctrl_scratch_write(unsigned int value) {
+	csr_writel(value >> 24, 0xe0000004L);
+	csr_writel(value >> 16, 0xe0000008L);
+	csr_writel(value >> 8, 0xe000000cL);
+	csr_writel(value, 0xe0000010L);
+}
+#define CSR_CTRL_BUS_ERRORS_ADDR 0xe0000014L
+#define CSR_CTRL_BUS_ERRORS_SIZE 4
+static inline unsigned int ctrl_bus_errors_read(void) {
+	unsigned int r = csr_readl(0xe0000014L);
+	r <<= 8;
+	r |= csr_readl(0xe0000018L);
+	r <<= 8;
+	r |= csr_readl(0xe000001cL);
+	r <<= 8;
+	r |= csr_readl(0xe0000020L);
+	return r;
+}
+
+/* lxspi */
+#define CSR_LXSPI_BASE 0xe0007800L
+#define CSR_LXSPI_BITBANG_ADDR 0xe0007800L
+#define CSR_LXSPI_BITBANG_SIZE 1
+static inline unsigned char lxspi_bitbang_read(void) {
+	unsigned char r = csr_readl(0xe0007800L);
+	return r;
+}
+static inline void lxspi_bitbang_write(unsigned char value) {
+	csr_writel(value, 0xe0007800L);
+}
+#define CSR_LXSPI_BITBANG_MOSI_OFFSET 0
+#define CSR_LXSPI_BITBANG_MOSI_SIZE 1
+#define CSR_LXSPI_BITBANG_CLK_OFFSET 1
+#define CSR_LXSPI_BITBANG_CLK_SIZE 1
+#define CSR_LXSPI_BITBANG_CS_N_OFFSET 2
+#define CSR_LXSPI_BITBANG_CS_N_SIZE 1
+#define CSR_LXSPI_BITBANG_DIR_OFFSET 3
+#define CSR_LXSPI_BITBANG_DIR_SIZE 1
+#define CSR_LXSPI_MISO_ADDR 0xe0007804L
+#define CSR_LXSPI_MISO_SIZE 1
+static inline unsigned char lxspi_miso_read(void) {
+	unsigned char r = csr_readl(0xe0007804L);
+	return r;
+}
+#define CSR_LXSPI_BITBANG_EN_ADDR 0xe0007808L
+#define CSR_LXSPI_BITBANG_EN_SIZE 1
+static inline unsigned char lxspi_bitbang_en_read(void) {
+	unsigned char r = csr_readl(0xe0007808L);
+	return r;
+}
+static inline void lxspi_bitbang_en_write(unsigned char value) {
+	csr_writel(value, 0xe0007808L);
+}
+
+/* messible */
+#define CSR_MESSIBLE_BASE 0xe0008000L
+#define CSR_MESSIBLE_IN_ADDR 0xe0008000L
+#define CSR_MESSIBLE_IN_SIZE 1
+static inline unsigned char messible_in_read(void) {
+	unsigned char r = csr_readl(0xe0008000L);
+	return r;
+}
+static inline void messible_in_write(unsigned char value) {
+	csr_writel(value, 0xe0008000L);
+}
+#define CSR_MESSIBLE_OUT_ADDR 0xe0008004L
+#define CSR_MESSIBLE_OUT_SIZE 1
+static inline unsigned char messible_out_read(void) {
+	unsigned char r = csr_readl(0xe0008004L);
+	return r;
+}
+#define CSR_MESSIBLE_STATUS_ADDR 0xe0008008L
+#define CSR_MESSIBLE_STATUS_SIZE 1
+static inline unsigned char messible_status_read(void) {
+	unsigned char r = csr_readl(0xe0008008L);
+	return r;
+}
+#define CSR_MESSIBLE_STATUS_FULL_OFFSET 0
+#define CSR_MESSIBLE_STATUS_FULL_SIZE 1
+#define CSR_MESSIBLE_STATUS_HAVE_OFFSET 1
+#define CSR_MESSIBLE_STATUS_HAVE_SIZE 1
+
+/* reboot */
+#define CSR_REBOOT_BASE 0xe0006000L
+#define CSR_REBOOT_CTRL_ADDR 0xe0006000L
+#define CSR_REBOOT_CTRL_SIZE 1
+static inline unsigned char reboot_ctrl_read(void) {
+	unsigned char r = csr_readl(0xe0006000L);
+	return r;
+}
+static inline void reboot_ctrl_write(unsigned char value) {
+	csr_writel(value, 0xe0006000L);
+}
+#define CSR_REBOOT_CTRL_IMAGE_OFFSET 0
+#define CSR_REBOOT_CTRL_IMAGE_SIZE 2
+#define CSR_REBOOT_CTRL_KEY_OFFSET 2
+#define CSR_REBOOT_CTRL_KEY_SIZE 6
+#define CSR_REBOOT_ADDR_ADDR 0xe0006004L
+#define CSR_REBOOT_ADDR_SIZE 4
+static inline unsigned int reboot_addr_read(void) {
+	unsigned int r = csr_readl(0xe0006004L);
+	r <<= 8;
+	r |= csr_readl(0xe0006008L);
+	r <<= 8;
+	r |= csr_readl(0xe000600cL);
+	r <<= 8;
+	r |= csr_readl(0xe0006010L);
+	return r;
+}
+static inline void reboot_addr_write(unsigned int value) {
+	csr_writel(value >> 24, 0xe0006004L);
+	csr_writel(value >> 16, 0xe0006008L);
+	csr_writel(value >> 8, 0xe000600cL);
+	csr_writel(value, 0xe0006010L);
+}
+
+/* rgb */
+#define CSR_RGB_BASE 0xe0006800L
+#define CSR_RGB_DAT_ADDR 0xe0006800L
+#define CSR_RGB_DAT_SIZE 1
+static inline unsigned char rgb_dat_read(void) {
+	unsigned char r = csr_readl(0xe0006800L);
+	return r;
+}
+static inline void rgb_dat_write(unsigned char value) {
+	csr_writel(value, 0xe0006800L);
+}
+#define CSR_RGB_ADDR_ADDR 0xe0006804L
+#define CSR_RGB_ADDR_SIZE 1
+static inline unsigned char rgb_addr_read(void) {
+	unsigned char r = csr_readl(0xe0006804L);
+	return r;
+}
+static inline void rgb_addr_write(unsigned char value) {
+	csr_writel(value, 0xe0006804L);
+}
+#define CSR_RGB_CTRL_ADDR 0xe0006808L
+#define CSR_RGB_CTRL_SIZE 1
+static inline unsigned char rgb_ctrl_read(void) {
+	unsigned char r = csr_readl(0xe0006808L);
+	return r;
+}
+static inline void rgb_ctrl_write(unsigned char value) {
+	csr_writel(value, 0xe0006808L);
+}
+#define CSR_RGB_CTRL_EXE_OFFSET 0
+#define CSR_RGB_CTRL_EXE_SIZE 1
+#define CSR_RGB_CTRL_CURREN_OFFSET 1
+#define CSR_RGB_CTRL_CURREN_SIZE 1
+#define CSR_RGB_CTRL_RGBLEDEN_OFFSET 2
+#define CSR_RGB_CTRL_RGBLEDEN_SIZE 1
+#define CSR_RGB_CTRL_RRAW_OFFSET 3
+#define CSR_RGB_CTRL_RRAW_SIZE 1
+#define CSR_RGB_CTRL_GRAW_OFFSET 4
+#define CSR_RGB_CTRL_GRAW_SIZE 1
+#define CSR_RGB_CTRL_BRAW_OFFSET 5
+#define CSR_RGB_CTRL_BRAW_SIZE 1
+#define CSR_RGB_RAW_ADDR 0xe000680cL
+#define CSR_RGB_RAW_SIZE 1
+static inline unsigned char rgb_raw_read(void) {
+	unsigned char r = csr_readl(0xe000680cL);
+	return r;
+}
+static inline void rgb_raw_write(unsigned char value) {
+	csr_writel(value, 0xe000680cL);
+}
+#define CSR_RGB_RAW_R_OFFSET 0
+#define CSR_RGB_RAW_R_SIZE 1
+#define CSR_RGB_RAW_G_OFFSET 1
+#define CSR_RGB_RAW_G_SIZE 1
+#define CSR_RGB_RAW_B_OFFSET 2
+#define CSR_RGB_RAW_B_SIZE 1
+
+/* timer0 */
+#define CSR_TIMER0_BASE 0xe0002800L
+#define CSR_TIMER0_LOAD_ADDR 0xe0002800L
+#define CSR_TIMER0_LOAD_SIZE 4
+static inline unsigned int timer0_load_read(void) {
+	unsigned int r = csr_readl(0xe0002800L);
+	r <<= 8;
+	r |= csr_readl(0xe0002804L);
+	r <<= 8;
+	r |= csr_readl(0xe0002808L);
+	r <<= 8;
+	r |= csr_readl(0xe000280cL);
+	return r;
+}
+static inline void timer0_load_write(unsigned int value) {
+	csr_writel(value >> 24, 0xe0002800L);
+	csr_writel(value >> 16, 0xe0002804L);
+	csr_writel(value >> 8, 0xe0002808L);
+	csr_writel(value, 0xe000280cL);
+}
+#define CSR_TIMER0_RELOAD_ADDR 0xe0002810L
+#define CSR_TIMER0_RELOAD_SIZE 4
+static inline unsigned int timer0_reload_read(void) {
+	unsigned int r = csr_readl(0xe0002810L);
+	r <<= 8;
+	r |= csr_readl(0xe0002814L);
+	r <<= 8;
+	r |= csr_readl(0xe0002818L);
+	r <<= 8;
+	r |= csr_readl(0xe000281cL);
+	return r;
+}
+static inline void timer0_reload_write(unsigned int value) {
+	csr_writel(value >> 24, 0xe0002810L);
+	csr_writel(value >> 16, 0xe0002814L);
+	csr_writel(value >> 8, 0xe0002818L);
+	csr_writel(value, 0xe000281cL);
+}
+#define CSR_TIMER0_EN_ADDR 0xe0002820L
+#define CSR_TIMER0_EN_SIZE 1
+static inline unsigned char timer0_en_read(void) {
+	unsigned char r = csr_readl(0xe0002820L);
+	return r;
+}
+static inline void timer0_en_write(unsigned char value) {
+	csr_writel(value, 0xe0002820L);
+}
+#define CSR_TIMER0_UPDATE_VALUE_ADDR 0xe0002824L
+#define CSR_TIMER0_UPDATE_VALUE_SIZE 1
+static inline unsigned char timer0_update_value_read(void) {
+	unsigned char r = csr_readl(0xe0002824L);
+	return r;
+}
+static inline void timer0_update_value_write(unsigned char value) {
+	csr_writel(value, 0xe0002824L);
+}
+#define CSR_TIMER0_VALUE_ADDR 0xe0002828L
+#define CSR_TIMER0_VALUE_SIZE 4
+static inline unsigned int timer0_value_read(void) {
+	unsigned int r = csr_readl(0xe0002828L);
+	r <<= 8;
+	r |= csr_readl(0xe000282cL);
+	r <<= 8;
+	r |= csr_readl(0xe0002830L);
+	r <<= 8;
+	r |= csr_readl(0xe0002834L);
+	return r;
+}
+#define CSR_TIMER0_EV_STATUS_ADDR 0xe0002838L
+#define CSR_TIMER0_EV_STATUS_SIZE 1
+static inline unsigned char timer0_ev_status_read(void) {
+	unsigned char r = csr_readl(0xe0002838L);
+	return r;
+}
+static inline void timer0_ev_status_write(unsigned char value) {
+	csr_writel(value, 0xe0002838L);
+}
+#define CSR_TIMER0_EV_PENDING_ADDR 0xe000283cL
+#define CSR_TIMER0_EV_PENDING_SIZE 1
+static inline unsigned char timer0_ev_pending_read(void) {
+	unsigned char r = csr_readl(0xe000283cL);
+	return r;
+}
+static inline void timer0_ev_pending_write(unsigned char value) {
+	csr_writel(value, 0xe000283cL);
+}
+#define CSR_TIMER0_EV_ENABLE_ADDR 0xe0002840L
+#define CSR_TIMER0_EV_ENABLE_SIZE 1
+static inline unsigned char timer0_ev_enable_read(void) {
+	unsigned char r = csr_readl(0xe0002840L);
+	return r;
+}
+static inline void timer0_ev_enable_write(unsigned char value) {
+	csr_writel(value, 0xe0002840L);
+}
+
+/* touch */
+#define CSR_TOUCH_BASE 0xe0005800L
+#define CSR_TOUCH_O_ADDR 0xe0005800L
+#define CSR_TOUCH_O_SIZE 1
+static inline unsigned char touch_o_read(void) {
+	unsigned char r = csr_readl(0xe0005800L);
+	return r;
+}
+static inline void touch_o_write(unsigned char value) {
+	csr_writel(value, 0xe0005800L);
+}
+#define CSR_TOUCH_O_O_OFFSET 0
+#define CSR_TOUCH_O_O_SIZE 4
+#define CSR_TOUCH_OE_ADDR 0xe0005804L
+#define CSR_TOUCH_OE_SIZE 1
+static inline unsigned char touch_oe_read(void) {
+	unsigned char r = csr_readl(0xe0005804L);
+	return r;
+}
+static inline void touch_oe_write(unsigned char value) {
+	csr_writel(value, 0xe0005804L);
+}
+#define CSR_TOUCH_OE_OE_OFFSET 0
+#define CSR_TOUCH_OE_OE_SIZE 4
+#define CSR_TOUCH_I_ADDR 0xe0005808L
+#define CSR_TOUCH_I_SIZE 1
+static inline unsigned char touch_i_read(void) {
+	unsigned char r = csr_readl(0xe0005808L);
+	return r;
+}
+#define CSR_TOUCH_I_I_OFFSET 0
+#define CSR_TOUCH_I_I_SIZE 4
+
+/* usb */
+#define CSR_USB_BASE 0xe0004800L
+#define CSR_USB_PULLUP_OUT_ADDR 0xe0004800L
+#define CSR_USB_PULLUP_OUT_SIZE 1
+static inline unsigned char usb_pullup_out_read(void) {
+	unsigned char r = csr_readl(0xe0004800L);
+	return r;
+}
+static inline void usb_pullup_out_write(unsigned char value) {
+	csr_writel(value, 0xe0004800L);
+}
+#define CSR_USB_SETUP_DATA_ADDR 0xe0004804L
+#define CSR_USB_SETUP_DATA_SIZE 1
+static inline unsigned char usb_setup_data_read(void) {
+	unsigned char r = csr_readl(0xe0004804L);
+	return r;
+}
+#define CSR_USB_SETUP_DATA_DATA_OFFSET 0
+#define CSR_USB_SETUP_DATA_DATA_SIZE 8
+#define CSR_USB_SETUP_CTRL_ADDR 0xe0004808L
+#define CSR_USB_SETUP_CTRL_SIZE 1
+static inline unsigned char usb_setup_ctrl_read(void) {
+	unsigned char r = csr_readl(0xe0004808L);
+	return r;
+}
+static inline void usb_setup_ctrl_write(unsigned char value) {
+	csr_writel(value, 0xe0004808L);
+}
+#define CSR_USB_SETUP_CTRL_HANDLED_OFFSET 1
+#define CSR_USB_SETUP_CTRL_HANDLED_SIZE 1
+#define CSR_USB_SETUP_CTRL_RESET_OFFSET 2
+#define CSR_USB_SETUP_CTRL_RESET_SIZE 1
+#define CSR_USB_SETUP_STATUS_ADDR 0xe000480cL
+#define CSR_USB_SETUP_STATUS_SIZE 1
+static inline unsigned char usb_setup_status_read(void) {
+	unsigned char r = csr_readl(0xe000480cL);
+	return r;
+}
+#define CSR_USB_SETUP_STATUS_HAVE_OFFSET 0
+#define CSR_USB_SETUP_STATUS_HAVE_SIZE 1
+#define CSR_USB_SETUP_STATUS_IS_IN_OFFSET 1
+#define CSR_USB_SETUP_STATUS_IS_IN_SIZE 1
+#define CSR_USB_SETUP_STATUS_EPNO_OFFSET 2
+#define CSR_USB_SETUP_STATUS_EPNO_SIZE 4
+#define CSR_USB_SETUP_STATUS_PEND_OFFSET 6
+#define CSR_USB_SETUP_STATUS_PEND_SIZE 1
+#define CSR_USB_SETUP_STATUS_DATA_OFFSET 7
+#define CSR_USB_SETUP_STATUS_DATA_SIZE 1
+#define CSR_USB_SETUP_EV_STATUS_ADDR 0xe0004810L
+#define CSR_USB_SETUP_EV_STATUS_SIZE 1
+static inline unsigned char usb_setup_ev_status_read(void) {
+	unsigned char r = csr_readl(0xe0004810L);
+	return r;
+}
+static inline void usb_setup_ev_status_write(unsigned char value) {
+	csr_writel(value, 0xe0004810L);
+}
+#define CSR_USB_SETUP_EV_PENDING_ADDR 0xe0004814L
+#define CSR_USB_SETUP_EV_PENDING_SIZE 1
+static inline unsigned char usb_setup_ev_pending_read(void) {
+	unsigned char r = csr_readl(0xe0004814L);
+	return r;
+}
+static inline void usb_setup_ev_pending_write(unsigned char value) {
+	csr_writel(value, 0xe0004814L);
+}
+#define CSR_USB_SETUP_EV_ENABLE_ADDR 0xe0004818L
+#define CSR_USB_SETUP_EV_ENABLE_SIZE 1
+static inline unsigned char usb_setup_ev_enable_read(void) {
+	unsigned char r = csr_readl(0xe0004818L);
+	return r;
+}
+static inline void usb_setup_ev_enable_write(unsigned char value) {
+	csr_writel(value, 0xe0004818L);
+}
+#define CSR_USB_IN_DATA_ADDR 0xe000481cL
+#define CSR_USB_IN_DATA_SIZE 1
+static inline unsigned char usb_in_data_read(void) {
+	unsigned char r = csr_readl(0xe000481cL);
+	return r;
+}
+static inline void usb_in_data_write(unsigned char value) {
+	csr_writel(value, 0xe000481cL);
+}
+#define CSR_USB_IN_DATA_DATA_OFFSET 0
+#define CSR_USB_IN_DATA_DATA_SIZE 8
+#define CSR_USB_IN_STATUS_ADDR 0xe0004820L
+#define CSR_USB_IN_STATUS_SIZE 1
+static inline unsigned char usb_in_status_read(void) {
+	unsigned char r = csr_readl(0xe0004820L);
+	return r;
+}
+#define CSR_USB_IN_STATUS_HAVE_OFFSET 0
+#define CSR_USB_IN_STATUS_HAVE_SIZE 1
+#define CSR_USB_IN_STATUS_IDLE_OFFSET 1
+#define CSR_USB_IN_STATUS_IDLE_SIZE 1
+#define CSR_USB_IN_STATUS_PEND_OFFSET 6
+#define CSR_USB_IN_STATUS_PEND_SIZE 1
+#define CSR_USB_IN_CTRL_ADDR 0xe0004824L
+#define CSR_USB_IN_CTRL_SIZE 1
+static inline unsigned char usb_in_ctrl_read(void) {
+	unsigned char r = csr_readl(0xe0004824L);
+	return r;
+}
+static inline void usb_in_ctrl_write(unsigned char value) {
+	csr_writel(value, 0xe0004824L);
+}
+#define CSR_USB_IN_CTRL_EP_OFFSET 0
+#define CSR_USB_IN_CTRL_EP_SIZE 4
+#define CSR_USB_IN_CTRL_STALL_OFFSET 4
+#define CSR_USB_IN_CTRL_STALL_SIZE 1
+#define CSR_USB_IN_CTRL_RESET_OFFSET 5
+#define CSR_USB_IN_CTRL_RESET_SIZE 1
+#define CSR_USB_IN_EV_STATUS_ADDR 0xe0004828L
+#define CSR_USB_IN_EV_STATUS_SIZE 1
+static inline unsigned char usb_in_ev_status_read(void) {
+	unsigned char r = csr_readl(0xe0004828L);
+	return r;
+}
+static inline void usb_in_ev_status_write(unsigned char value) {
+	csr_writel(value, 0xe0004828L);
+}
+#define CSR_USB_IN_EV_PENDING_ADDR 0xe000482cL
+#define CSR_USB_IN_EV_PENDING_SIZE 1
+static inline unsigned char usb_in_ev_pending_read(void) {
+	unsigned char r = csr_readl(0xe000482cL);
+	return r;
+}
+static inline void usb_in_ev_pending_write(unsigned char value) {
+	csr_writel(value, 0xe000482cL);
+}
+#define CSR_USB_IN_EV_ENABLE_ADDR 0xe0004830L
+#define CSR_USB_IN_EV_ENABLE_SIZE 1
+static inline unsigned char usb_in_ev_enable_read(void) {
+	unsigned char r = csr_readl(0xe0004830L);
+	return r;
+}
+static inline void usb_in_ev_enable_write(unsigned char value) {
+	csr_writel(value, 0xe0004830L);
+}
+#define CSR_USB_OUT_DATA_ADDR 0xe0004834L
+#define CSR_USB_OUT_DATA_SIZE 1
+static inline unsigned char usb_out_data_read(void) {
+	unsigned char r = csr_readl(0xe0004834L);
+	return r;
+}
+#define CSR_USB_OUT_DATA_DATA_OFFSET 0
+#define CSR_USB_OUT_DATA_DATA_SIZE 8
+#define CSR_USB_OUT_STATUS_ADDR 0xe0004838L
+#define CSR_USB_OUT_STATUS_SIZE 1
+static inline unsigned char usb_out_status_read(void) {
+	unsigned char r = csr_readl(0xe0004838L);
+	return r;
+}
+#define CSR_USB_OUT_STATUS_HAVE_OFFSET 0
+#define CSR_USB_OUT_STATUS_HAVE_SIZE 1
+#define CSR_USB_OUT_STATUS_IDLE_OFFSET 1
+#define CSR_USB_OUT_STATUS_IDLE_SIZE 1
+#define CSR_USB_OUT_STATUS_EPNO_OFFSET 2
+#define CSR_USB_OUT_STATUS_EPNO_SIZE 4
+#define CSR_USB_OUT_STATUS_PEND_OFFSET 6
+#define CSR_USB_OUT_STATUS_PEND_SIZE 1
+#define CSR_USB_OUT_CTRL_ADDR 0xe000483cL
+#define CSR_USB_OUT_CTRL_SIZE 1
+static inline unsigned char usb_out_ctrl_read(void) {
+	unsigned char r = csr_readl(0xe000483cL);
+	return r;
+}
+static inline void usb_out_ctrl_write(unsigned char value) {
+	csr_writel(value, 0xe000483cL);
+}
+#define CSR_USB_OUT_CTRL_ENABLE_OFFSET 1
+#define CSR_USB_OUT_CTRL_ENABLE_SIZE 1
+#define CSR_USB_OUT_CTRL_RESET_OFFSET 2
+#define CSR_USB_OUT_CTRL_RESET_SIZE 1
+#define CSR_USB_OUT_STALL_ADDR 0xe0004840L
+#define CSR_USB_OUT_STALL_SIZE 1
+static inline unsigned char usb_out_stall_read(void) {
+	unsigned char r = csr_readl(0xe0004840L);
+	return r;
+}
+static inline void usb_out_stall_write(unsigned char value) {
+	csr_writel(value, 0xe0004840L);
+}
+#define CSR_USB_OUT_STALL_EPNO_OFFSET 0
+#define CSR_USB_OUT_STALL_EPNO_SIZE 4
+#define CSR_USB_OUT_STALL_STALL_OFFSET 4
+#define CSR_USB_OUT_STALL_STALL_SIZE 1
+#define CSR_USB_OUT_EV_STATUS_ADDR 0xe0004844L
+#define CSR_USB_OUT_EV_STATUS_SIZE 1
+static inline unsigned char usb_out_ev_status_read(void) {
+	unsigned char r = csr_readl(0xe0004844L);
+	return r;
+}
+static inline void usb_out_ev_status_write(unsigned char value) {
+	csr_writel(value, 0xe0004844L);
+}
+#define CSR_USB_OUT_EV_PENDING_ADDR 0xe0004848L
+#define CSR_USB_OUT_EV_PENDING_SIZE 1
+static inline unsigned char usb_out_ev_pending_read(void) {
+	unsigned char r = csr_readl(0xe0004848L);
+	return r;
+}
+static inline void usb_out_ev_pending_write(unsigned char value) {
+	csr_writel(value, 0xe0004848L);
+}
+#define CSR_USB_OUT_EV_ENABLE_ADDR 0xe000484cL
+#define CSR_USB_OUT_EV_ENABLE_SIZE 1
+static inline unsigned char usb_out_ev_enable_read(void) {
+	unsigned char r = csr_readl(0xe000484cL);
+	return r;
+}
+static inline void usb_out_ev_enable_write(unsigned char value) {
+	csr_writel(value, 0xe000484cL);
+}
+#define CSR_USB_ADDRESS_ADDR 0xe0004850L
+#define CSR_USB_ADDRESS_SIZE 1
+static inline unsigned char usb_address_read(void) {
+	unsigned char r = csr_readl(0xe0004850L);
+	return r;
+}
+static inline void usb_address_write(unsigned char value) {
+	csr_writel(value, 0xe0004850L);
+}
+#define CSR_USB_ADDRESS_ADDR_OFFSET 0
+#define CSR_USB_ADDRESS_ADDR_SIZE 7
+#define CSR_USB_STAGE_NUM_ADDR 0xe0004854L
+#define CSR_USB_STAGE_NUM_SIZE 1
+static inline unsigned char usb_stage_num_read(void) {
+	unsigned char r = csr_readl(0xe0004854L);
+	return r;
+}
+#define CSR_USB_LAST_STAGE_NUM_ADDR 0xe0004858L
+#define CSR_USB_LAST_STAGE_NUM_SIZE 1
+static inline unsigned char usb_last_stage_num_read(void) {
+	unsigned char r = csr_readl(0xe0004858L);
+	return r;
+}
+
+/* version */
+#define CSR_VERSION_BASE 0xe0007000L
+#define CSR_VERSION_MAJOR_ADDR 0xe0007000L
+#define CSR_VERSION_MAJOR_SIZE 1
+static inline unsigned char version_major_read(void) {
+	unsigned char r = csr_readl(0xe0007000L);
+	return r;
+}
+#define CSR_VERSION_MINOR_ADDR 0xe0007004L
+#define CSR_VERSION_MINOR_SIZE 1
+static inline unsigned char version_minor_read(void) {
+	unsigned char r = csr_readl(0xe0007004L);
+	return r;
+}
+#define CSR_VERSION_REVISION_ADDR 0xe0007008L
+#define CSR_VERSION_REVISION_SIZE 1
+static inline unsigned char version_revision_read(void) {
+	unsigned char r = csr_readl(0xe0007008L);
+	return r;
+}
+#define CSR_VERSION_GITREV_ADDR 0xe000700cL
+#define CSR_VERSION_GITREV_SIZE 4
+static inline unsigned int version_gitrev_read(void) {
+	unsigned int r = csr_readl(0xe000700cL);
+	r <<= 8;
+	r |= csr_readl(0xe0007010L);
+	r <<= 8;
+	r |= csr_readl(0xe0007014L);
+	r <<= 8;
+	r |= csr_readl(0xe0007018L);
+	return r;
+}
+#define CSR_VERSION_GITEXTRA_ADDR 0xe000701cL
+#define CSR_VERSION_GITEXTRA_SIZE 2
+static inline unsigned short int version_gitextra_read(void) {
+	unsigned short int r = csr_readl(0xe000701cL);
+	r <<= 8;
+	r |= csr_readl(0xe0007020L);
+	return r;
+}
+#define CSR_VERSION_DIRTY_ADDR 0xe0007024L
+#define CSR_VERSION_DIRTY_SIZE 1
+static inline unsigned char version_dirty_read(void) {
+	unsigned char r = csr_readl(0xe0007024L);
+	return r;
+}
+#define CSR_VERSION_DIRTY_DIRTY_OFFSET 0
+#define CSR_VERSION_DIRTY_DIRTY_SIZE 1
+#define CSR_VERSION_MODEL_ADDR 0xe0007028L
+#define CSR_VERSION_MODEL_SIZE 1
+static inline unsigned char version_model_read(void) {
+	unsigned char r = csr_readl(0xe0007028L);
+	return r;
+}
+#define CSR_VERSION_MODEL_MODEL_OFFSET 0
+#define CSR_VERSION_MODEL_MODEL_SIZE 8
+#define CSR_VERSION_SEED_ADDR 0xe000702cL
+#define CSR_VERSION_SEED_SIZE 4
+static inline unsigned int version_seed_read(void) {
+	unsigned int r = csr_readl(0xe000702cL);
+	r <<= 8;
+	r |= csr_readl(0xe0007030L);
+	r <<= 8;
+	r |= csr_readl(0xe0007034L);
+	r <<= 8;
+	r |= csr_readl(0xe0007038L);
+	return r;
+}
+
+/* constants */
+#define TIMER0_INTERRUPT 2
+static inline int timer0_interrupt_read(void) {
+	return 2;
+}
+#define USB_INTERRUPT 3
+static inline int usb_interrupt_read(void) {
+	return 3;
+}
+#define SPI_BOOT 1
+static inline int spi_boot_read(void) {
+	return 1;
+}
+#define SPI_ENTRYPOINT 536977408
+static inline int spi_entrypoint_read(void) {
+	return 536977408;
+}
+#define CONFIG_BITSTREAM_SYNC_HEADER1 2123999870
+static inline int config_bitstream_sync_header1_read(void) {
+	return 2123999870;
+}
+#define CONFIG_BITSTREAM_SYNC_HEADER2 2125109630
+static inline int config_bitstream_sync_header2_read(void) {
+	return 2125109630;
+}
+#define CONFIG_CLOCK_FREQUENCY 12000000
+static inline int config_clock_frequency_read(void) {
+	return 12000000;
+}
+#define CONFIG_CPU_RESET_ADDR 0
+static inline int config_cpu_reset_addr_read(void) {
+	return 0;
+}
+#define CONFIG_CPU_TYPE "VEXRISCV"
+static inline const char * config_cpu_type_read(void) {
+	return "VEXRISCV";
+}
+#define CONFIG_CPU_TYPE_VEXRISCV 1
+static inline int config_cpu_type_vexriscv_read(void) {
+	return 1;
+}
+#define CONFIG_CPU_VARIANT "MIN"
+static inline const char * config_cpu_variant_read(void) {
+	return "MIN";
+}
+#define CONFIG_CPU_VARIANT_MIN 1
+static inline int config_cpu_variant_min_read(void) {
+	return 1;
+}
+#define CONFIG_CSR_ALIGNMENT 32
+static inline int config_csr_alignment_read(void) {
+	return 32;
+}
+#define CONFIG_CSR_DATA_WIDTH 8
+static inline int config_csr_data_width_read(void) {
+	return 8;
+}
+
+#endif

hw/bsp/fomu/include/hw/common.h

@@ -0,0 +1,33 @@
+#ifndef _HW_COMMON_H_
+#define _HW_COMMON_H_
+#include <stdint.h>
+static inline void csr_writeb(uint8_t value, uint32_t addr)
+{
+	*((volatile uint8_t *)addr) = value;
+}
+
+static inline uint8_t csr_readb(uint32_t addr)
+{
+	return *(volatile uint8_t *)addr;
+}
+
+static inline void csr_writew(uint16_t value, uint32_t addr)
+{
+	*((volatile uint16_t *)addr) = value;
+}
+
+static inline uint16_t csr_readw(uint32_t addr)
+{
+	return *(volatile uint16_t *)addr;
+}
+
+static inline void csr_writel(uint32_t value, uint32_t addr)
+{
+	*((volatile uint32_t *)addr) = value;
+}
+
+static inline uint32_t csr_readl(uint32_t addr)
+{
+	return *(volatile uint32_t *)addr;
+}
+#endif /* _HW_COMMON_H_ */

hw/bsp/fomu/include/irq.h

@@ -0,0 +1,71 @@
+#ifndef __IRQ_H
+#define __IRQ_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+#define CSR_MSTATUS_MIE 0x8
+
+#define CSR_IRQ_MASK 0xBC0
+#define CSR_IRQ_PENDING 0xFC0
+
+#define CSR_DCACHE_INFO 0xCC0
+
+#define csrr(reg) ({ unsigned long __tmp; \
+  asm volatile ("csrr %0, " #reg : "=r"(__tmp)); \
+  __tmp; })
+
+#define csrw(reg, val) ({ \
+  if (__builtin_constant_p(val) && (unsigned long)(val) < 32) \
+	asm volatile ("csrw " #reg ", %0" :: "i"(val)); \
+  else \
+	asm volatile ("csrw " #reg ", %0" :: "r"(val)); })
+
+#define csrs(reg, bit) ({ \
+  if (__builtin_constant_p(bit) && (unsigned long)(bit) < 32) \
+	asm volatile ("csrrs x0, " #reg ", %0" :: "i"(bit)); \
+  else \
+	asm volatile ("csrrs x0, " #reg ", %0" :: "r"(bit)); })
+
+#define csrc(reg, bit) ({ \
+  if (__builtin_constant_p(bit) && (unsigned long)(bit) < 32) \
+	asm volatile ("csrrc x0, " #reg ", %0" :: "i"(bit)); \
+  else \
+	asm volatile ("csrrc x0, " #reg ", %0" :: "r"(bit)); })
+
+static inline unsigned int irq_getie(void)
+{
+	return (csrr(mstatus) & CSR_MSTATUS_MIE) != 0;
+}
+
+static inline void irq_setie(unsigned int ie)
+{
+	if(ie) csrs(mstatus,CSR_MSTATUS_MIE); else csrc(mstatus,CSR_MSTATUS_MIE);
+}
+
+static inline unsigned int irq_getmask(void)
+{
+	unsigned int mask;
+	asm volatile ("csrr %0, %1" : "=r"(mask) : "i"(CSR_IRQ_MASK));
+	return mask;
+}
+
+static inline void irq_setmask(unsigned int mask)
+{
+	asm volatile ("csrw %0, %1" :: "i"(CSR_IRQ_MASK), "r"(mask));
+}
+
+static inline unsigned int irq_pending(void)
+{
+	unsigned int pending;
+	asm volatile ("csrr %0, %1" : "=r"(pending) : "i"(CSR_IRQ_PENDING));
+	return pending;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __IRQ_H */

hw/bsp/fomu/output_format.ld

@@ -0,0 +1 @@
+OUTPUT_FORMAT("elf32-littleriscv")

hw/bsp/fomu/regions.ld

@@ -0,0 +1,6 @@
+MEMORY {
+	csr : ORIGIN = 0x60000000, LENGTH = 0x01000000
+	vexriscv_debug : ORIGIN = 0xf00f0000, LENGTH = 0x00000100
+	sram : ORIGIN = 0x10000000, LENGTH = 0x00020000
+	rom : ORIGIN = 0x00000000, LENGTH = 0x00002000
+}