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-rw-r--r--src/mainboard/emulation/spike-riscv/Kconfig61
-rw-r--r--src/mainboard/emulation/spike-riscv/Kconfig.name2
-rw-r--r--src/mainboard/emulation/spike-riscv/Makefile.inc26
-rw-r--r--src/mainboard/emulation/spike-riscv/board_info.txt2
-rw-r--r--src/mainboard/emulation/spike-riscv/bootblock.c34
-rw-r--r--src/mainboard/emulation/spike-riscv/devicetree.cb20
-rw-r--r--src/mainboard/emulation/spike-riscv/mainboard.c34
-rw-r--r--src/mainboard/emulation/spike-riscv/memlayout.ld32
-rw-r--r--src/mainboard/emulation/spike-riscv/romstage.c23
-rw-r--r--src/mainboard/emulation/spike-riscv/spike_util.c82
-rw-r--r--src/mainboard/emulation/spike-riscv/uart.c61
11 files changed, 377 insertions, 0 deletions
diff --git a/src/mainboard/emulation/spike-riscv/Kconfig b/src/mainboard/emulation/spike-riscv/Kconfig
new file mode 100644
index 0000000000..7c7fb346a4
--- /dev/null
+++ b/src/mainboard/emulation/spike-riscv/Kconfig
@@ -0,0 +1,61 @@
+##
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2014 Google Inc.
+##
+## This software is licensed under the terms of the GNU General Public
+## License version 2, as published by the Free Software Foundation, and
+## may be copied, distributed, and modified under those terms.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+## GNU General Public License for more details.
+
+# To execute, do:
+# qemu-system-arm -M vexpress-a9 -m 1024M -nographic -kernel build/coreboot.rom
+
+if BOARD_EMULATION_SPIKE_UCB_RISCV
+
+config BOARD_SPECIFIC_OPTIONS # dummy
+ def_bool y
+ select SOC_UCB_RISCV
+ select BOARD_ROMSIZE_KB_4096
+ select ARCH_BOOTBLOCK_RISCV
+ select HAVE_UART_SPECIAL
+
+config MAINBOARD_DIR
+ string
+ default emulation/spike-riscv
+
+config MAINBOARD_PART_NUMBER
+ string
+ default "SPIKE RISCV"
+
+config MAX_CPUS
+ int
+ default 1
+
+config MAINBOARD_VENDOR
+ string
+ default "UCB"
+
+config DRAM_SIZE_MB
+ int
+ default 32768
+
+# Memory map for qemu riscv
+#
+# 0x0000_0000: jump instruction (by qemu)
+# 0x0002_0000: bootblock (entry of kernel / firmware)
+# 0x0003_0000: romstage, assume up to 128KB in size.
+# 0x0007_ff00: stack pointer
+# 0x0010_0000: CBFS header
+# 0x0011_0000: CBFS data
+# 0x0100_0000: reserved for ramstage
+
+config RAMTOP
+ hex
+ default 0x1000000
+
+endif # BOARD_EMULATION_SPIKE_UCB_RISCV
diff --git a/src/mainboard/emulation/spike-riscv/Kconfig.name b/src/mainboard/emulation/spike-riscv/Kconfig.name
new file mode 100644
index 0000000000..36dd509eb0
--- /dev/null
+++ b/src/mainboard/emulation/spike-riscv/Kconfig.name
@@ -0,0 +1,2 @@
+config BOARD_EMULATION_SPIKE_UCB_RISCV
+ bool "SPIKE ucb riscv"
diff --git a/src/mainboard/emulation/spike-riscv/Makefile.inc b/src/mainboard/emulation/spike-riscv/Makefile.inc
new file mode 100644
index 0000000000..dff4758173
--- /dev/null
+++ b/src/mainboard/emulation/spike-riscv/Makefile.inc
@@ -0,0 +1,26 @@
+##
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2013 Google Inc.
+##
+## This software is licensed under the terms of the GNU General Public
+## License version 2, as published by the Free Software Foundation, and
+## may be copied, distributed, and modified under those terms.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+## GNU General Public License for more details.
+
+bootblock-y += bootblock.c
+bootblock-y += uart.c
+bootblock-y += spike_util.c
+romstage-y += romstage.c
+romstage-y += uart.c
+romstage-y += spike_util.c
+ramstage-y += uart.c
+ramstage-y += spike_util.c
+
+bootblock-y += memlayout.ld
+romstage-y += memlayout.ld
+ramstage-y += memlayout.ld
diff --git a/src/mainboard/emulation/spike-riscv/board_info.txt b/src/mainboard/emulation/spike-riscv/board_info.txt
new file mode 100644
index 0000000000..811e8e0840
--- /dev/null
+++ b/src/mainboard/emulation/spike-riscv/board_info.txt
@@ -0,0 +1,2 @@
+Board name: QEMU RISCV
+Category: emulation
diff --git a/src/mainboard/emulation/spike-riscv/bootblock.c b/src/mainboard/emulation/spike-riscv/bootblock.c
new file mode 100644
index 0000000000..56f2eca863
--- /dev/null
+++ b/src/mainboard/emulation/spike-riscv/bootblock.c
@@ -0,0 +1,34 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2013 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc.
+ */
+
+#include <arch/exception.h>
+#include <bootblock_common.h>
+#include <console/console.h>
+#include <program_loading.h>
+
+// the qemu part of all this is very, very non-hardware like.
+// so it gets its own bootblock.
+void main(void)
+{
+ if (IS_ENABLED(CONFIG_BOOTBLOCK_CONSOLE)) {
+ console_init();
+ exception_init();
+ }
+ run_romstage();
+}
diff --git a/src/mainboard/emulation/spike-riscv/devicetree.cb b/src/mainboard/emulation/spike-riscv/devicetree.cb
new file mode 100644
index 0000000000..e3ce08829e
--- /dev/null
+++ b/src/mainboard/emulation/spike-riscv/devicetree.cb
@@ -0,0 +1,20 @@
+##
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2014 Google, Inc.
+##
+## This software is licensed under the terms of the GNU General Public
+## License version 2, as published by the Free Software Foundation, and
+## may be copied, distributed, and modified under those terms.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+## GNU General Public License for more details.
+
+chip soc/ucb/riscv
+ device cpu_cluster 0 on end
+ chip drivers/generic/generic # I2C0 controller
+ device i2c 6 on end # Fake component for testing
+ end
+end
diff --git a/src/mainboard/emulation/spike-riscv/mainboard.c b/src/mainboard/emulation/spike-riscv/mainboard.c
new file mode 100644
index 0000000000..111e9b185b
--- /dev/null
+++ b/src/mainboard/emulation/spike-riscv/mainboard.c
@@ -0,0 +1,34 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <console/console.h>
+#include <device/device.h>
+#include <cbmem.h>
+
+static void mainboard_enable(device_t dev)
+{
+
+ if (!dev) {
+ printk(BIOS_EMERG, "No dev0; die\n");
+ while (1);
+ }
+
+ ram_resource(dev, 0, 2048, 32768);
+ cbmem_recovery(0);
+}
+
+struct chip_operations mainboard_ops = {
+ .enable_dev = mainboard_enable,
+};
diff --git a/src/mainboard/emulation/spike-riscv/memlayout.ld b/src/mainboard/emulation/spike-riscv/memlayout.ld
new file mode 100644
index 0000000000..8801f3520b
--- /dev/null
+++ b/src/mainboard/emulation/spike-riscv/memlayout.ld
@@ -0,0 +1,32 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2014 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc.
+ */
+
+#include <memlayout.h>
+
+#include <arch/header.ld>
+
+SECTIONS
+{
+ DRAM_START(0x0)
+ BOOTBLOCK(0x0, 64K)
+ ROMSTAGE(0x20000, 128K)
+ STACK(0x40000, 0x3ff00)
+ PRERAM_CBMEM_CONSOLE(0x80000, 8K)
+ RAMSTAGE(0x100000, 16M)
+}
diff --git a/src/mainboard/emulation/spike-riscv/romstage.c b/src/mainboard/emulation/spike-riscv/romstage.c
new file mode 100644
index 0000000000..b6314ccd1c
--- /dev/null
+++ b/src/mainboard/emulation/spike-riscv/romstage.c
@@ -0,0 +1,23 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <console/console.h>
+#include <program_loading.h>
+
+void main(void)
+{
+ console_init();
+ run_ramstage();
+}
diff --git a/src/mainboard/emulation/spike-riscv/spike_util.c b/src/mainboard/emulation/spike-riscv/spike_util.c
new file mode 100644
index 0000000000..b34ff4a0d0
--- /dev/null
+++ b/src/mainboard/emulation/spike-riscv/spike_util.c
@@ -0,0 +1,82 @@
+#include <spike_util.h>
+
+uintptr_t htif_interrupt(uintptr_t mcause, uintptr_t* regs) {
+ uintptr_t fromhost = swap_csr(mfromhost, 0);
+ if (!fromhost)
+ return 0;
+
+ uintptr_t dev = FROMHOST_DEV(fromhost);
+ uintptr_t cmd = FROMHOST_CMD(fromhost);
+ uintptr_t data = FROMHOST_DATA(fromhost);
+
+ sbi_device_message* m = HLS()->device_request_queue_head;
+ sbi_device_message* prev = 0x0;
+ unsigned long i, n;
+ for (i = 0, n = HLS()->device_request_queue_size; i < n; i++) {
+ /*
+ if (!supervisor_paddr_valid(m, sizeof(*m))
+ && EXTRACT_FIELD(read_csr(mstatus), MSTATUS_PRV1) != PRV_M)
+ panic("htif: page fault");
+ */
+
+ sbi_device_message* next = (void*)m->sbi_private_data;
+ if (m->dev == dev && m->cmd == cmd) {
+ m->data = data;
+
+ // dequeue from request queue
+ if (prev)
+ prev->sbi_private_data = (uintptr_t)next;
+ else
+ HLS()->device_request_queue_head = next;
+ HLS()->device_request_queue_size = n-1;
+ m->sbi_private_data = 0;
+
+ // enqueue to response queue
+ if (HLS()->device_response_queue_tail)
+ {
+ HLS()->device_response_queue_tail->sbi_private_data = (uintptr_t)m;
+ }
+ else
+ {
+ HLS()->device_response_queue_head = m;
+ }
+ HLS()->device_response_queue_tail = m;
+
+ // signal software interrupt
+ set_csr(mip, MIP_SSIP);
+ return 0;
+ }
+
+ prev = m;
+ m = (void*)atomic_read(&m->sbi_private_data);
+ }
+ //HLT();
+ return 0;
+ //panic("htif: no record");
+}
+
+uintptr_t mcall_console_putchar(uint8_t ch)
+{
+ while (swap_csr(mtohost, TOHOST_CMD(1, 1, ch)) != 0);
+ while (1) {
+ uintptr_t fromhost = read_csr(mfromhost);
+ if (FROMHOST_DEV(fromhost) != 1 || FROMHOST_CMD(fromhost) != 1) {
+ if (fromhost)
+ htif_interrupt(0, 0);
+ continue;
+ }
+ write_csr(mfromhost, 0);
+ break;
+ }
+ return 0;
+}
+
+void testPrint(void) {
+ /* Print a test command to check Spike console output */
+ mcall_console_putchar('h');
+ mcall_console_putchar('e');
+ mcall_console_putchar('l');
+ mcall_console_putchar('l');
+ mcall_console_putchar('o');
+ mcall_console_putchar('\n');
+}
diff --git a/src/mainboard/emulation/spike-riscv/uart.c b/src/mainboard/emulation/spike-riscv/uart.c
new file mode 100644
index 0000000000..961ddc56d4
--- /dev/null
+++ b/src/mainboard/emulation/spike-riscv/uart.c
@@ -0,0 +1,61 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2014 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc.
+ */
+
+#include <types.h>
+#include <console/uart.h>
+#include <arch/io.h>
+#include <boot/coreboot_tables.h>
+#include <spike_util.h>
+
+static uint8_t *buf = (void *)0x3f8;
+uintptr_t uart_platform_base(int idx)
+{
+ return (uintptr_t) buf;
+}
+
+void uart_init(int idx)
+{
+}
+
+unsigned char uart_rx_byte(int idx)
+{
+ return *buf; // this does not work on spike, requires more implementation details
+}
+
+void uart_tx_byte(int idx, unsigned char data)
+{
+ mcall_console_putchar(data);
+}
+
+void uart_tx_flush(int idx)
+{
+}
+
+#ifndef __PRE_RAM__
+void uart_fill_lb(void *data)
+{
+ struct lb_serial serial;
+ serial.type = LB_SERIAL_TYPE_MEMORY_MAPPED;
+ serial.baseaddr = 0x3f8;
+ serial.baud = 115200;
+ serial.regwidth = 1;
+ lb_add_serial(&serial, data);
+ lb_add_console(LB_TAG_CONSOLE_SERIAL8250MEM, data);
+}
+#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-27 11:45:05 +0000