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-rw-r--r--hw/milkymist.c216
1 files changed, 216 insertions, 0 deletions
diff --git a/hw/milkymist.c b/hw/milkymist.c
new file mode 100644
index 0000000000..8defad8024
--- /dev/null
+++ b/hw/milkymist.c
@@ -0,0 +1,216 @@
+/*
+ * QEMU model for the Milkymist board.
+ *
+ * Copyright (c) 2010 Michael Walle <michael@walle.cc>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "sysbus.h"
+#include "hw.h"
+#include "net.h"
+#include "flash.h"
+#include "sysemu.h"
+#include "devices.h"
+#include "boards.h"
+#include "loader.h"
+#include "elf.h"
+#include "blockdev.h"
+#include "milkymist-hw.h"
+#include "lm32.h"
+
+#define BIOS_FILENAME "mmone-bios.bin"
+#define BIOS_OFFSET 0x00860000
+#define BIOS_SIZE (512*1024)
+#define KERNEL_LOAD_ADDR 0x40000000
+
+typedef struct {
+ CPUState *env;
+ target_phys_addr_t bootstrap_pc;
+ target_phys_addr_t flash_base;
+ target_phys_addr_t initrd_base;
+ size_t initrd_size;
+ target_phys_addr_t cmdline_base;
+} ResetInfo;
+
+static void cpu_irq_handler(void *opaque, int irq, int level)
+{
+ CPUState *env = opaque;
+
+ if (level) {
+ cpu_interrupt(env, CPU_INTERRUPT_HARD);
+ } else {
+ cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
+ }
+}
+
+static void main_cpu_reset(void *opaque)
+{
+ ResetInfo *reset_info = opaque;
+ CPUState *env = reset_info->env;
+
+ cpu_reset(env);
+
+ /* init defaults */
+ env->pc = reset_info->bootstrap_pc;
+ env->regs[R_R1] = reset_info->cmdline_base;
+ env->regs[R_R2] = reset_info->initrd_base;
+ env->regs[R_R3] = reset_info->initrd_base + reset_info->initrd_size;
+ env->eba = reset_info->flash_base;
+ env->deba = reset_info->flash_base;
+}
+
+static void
+milkymist_init(ram_addr_t ram_size_not_used,
+ const char *boot_device,
+ const char *kernel_filename,
+ const char *kernel_cmdline,
+ const char *initrd_filename, const char *cpu_model)
+{
+ CPUState *env;
+ int kernel_size;
+ DriveInfo *dinfo;
+ ram_addr_t phys_sdram;
+ ram_addr_t phys_flash;
+ qemu_irq irq[32], *cpu_irq;
+ int i;
+ char *bios_filename;
+ ResetInfo *reset_info;
+
+ /* memory map */
+ target_phys_addr_t flash_base = 0x00000000;
+ size_t flash_sector_size = 128 * 1024;
+ size_t flash_size = 32 * 1024 * 1024;
+ target_phys_addr_t sdram_base = 0x40000000;
+ size_t sdram_size = 128 * 1024 * 1024;
+
+ target_phys_addr_t initrd_base = sdram_base + 0x1002000;
+ target_phys_addr_t cmdline_base = sdram_base + 0x1000000;
+ size_t initrd_max = sdram_size - 0x1002000;
+
+ reset_info = qemu_mallocz(sizeof(ResetInfo));
+
+ if (cpu_model == NULL) {
+ cpu_model = "lm32-full";
+ }
+ env = cpu_init(cpu_model);
+ reset_info->env = env;
+
+ cpu_lm32_set_phys_msb_ignore(env, 1);
+
+ phys_sdram = qemu_ram_alloc(NULL, "milkymist.sdram", sdram_size);
+ cpu_register_physical_memory(sdram_base, sdram_size,
+ phys_sdram | IO_MEM_RAM);
+
+ phys_flash = qemu_ram_alloc(NULL, "milkymist.flash", flash_size);
+ dinfo = drive_get(IF_PFLASH, 0, 0);
+ /* Numonyx JS28F256J3F105 */
+ pflash_cfi01_register(flash_base, phys_flash,
+ dinfo ? dinfo->bdrv : NULL, flash_sector_size,
+ flash_size / flash_sector_size, 2,
+ 0x00, 0x89, 0x00, 0x1d, 1);
+
+ /* create irq lines */
+ cpu_irq = qemu_allocate_irqs(cpu_irq_handler, env, 1);
+ env->pic_state = lm32_pic_init(*cpu_irq);
+ for (i = 0; i < 32; i++) {
+ irq[i] = qdev_get_gpio_in(env->pic_state, i);
+ }
+
+ /* load bios rom */
+ if (bios_name == NULL) {
+ bios_name = BIOS_FILENAME;
+ }
+ bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
+
+ if (bios_filename) {
+ load_image_targphys(bios_filename, BIOS_OFFSET, BIOS_SIZE);
+ }
+
+ reset_info->bootstrap_pc = BIOS_OFFSET;
+
+ /* if no kernel is given no valid bios rom is a fatal error */
+ if (!kernel_filename && !dinfo && !bios_filename) {
+ fprintf(stderr, "qemu: could not load Milkymist One bios '%s'\n",
+ bios_name);
+ exit(1);
+ }
+
+ milkymist_uart_create(0x60000000, irq[0], irq[1]);
+ milkymist_sysctl_create(0x60001000, irq[2], irq[3], irq[4],
+ 80000000, 0x10014d31, 0x0000041f, 0x00000001);
+ milkymist_hpdmc_create(0x60002000);
+ milkymist_vgafb_create(0x60003000, 0x40000000, 0x0fffffff);
+ milkymist_memcard_create(0x60004000);
+ milkymist_ac97_create(0x60005000, irq[5], irq[6], irq[7], irq[8]);
+ milkymist_pfpu_create(0x60006000, irq[9]);
+ milkymist_tmu2_create(0x60007000, irq[10]);
+ milkymist_minimac_create(0x60008000, irq[11], irq[12]);
+ milkymist_softusb_create(0x6000f000, irq[17],
+ 0x20000000, 0x1000, 0x20020000, 0x2000);
+
+ /* make sure juart isn't the first chardev */
+ env->juart_state = lm32_juart_init();
+
+ if (kernel_filename) {
+ uint64_t entry;
+
+ /* Boots a kernel elf binary. */
+ kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
+ 1, ELF_MACHINE, 0);
+ reset_info->bootstrap_pc = entry;
+
+ if (kernel_size < 0) {
+ kernel_size = load_image_targphys(kernel_filename, sdram_base,
+ sdram_size);
+ reset_info->bootstrap_pc = sdram_base;
+ }
+
+ if (kernel_size < 0) {
+ fprintf(stderr, "qemu: could not load kernel '%s'\n",
+ kernel_filename);
+ exit(1);
+ }
+ }
+
+ if (kernel_cmdline && strlen(kernel_cmdline)) {
+ pstrcpy_targphys("cmdline", cmdline_base, TARGET_PAGE_SIZE,
+ kernel_cmdline);
+ reset_info->cmdline_base = (uint32_t)cmdline_base;
+ }
+
+ if (initrd_filename) {
+ size_t initrd_size;
+ initrd_size = load_image_targphys(initrd_filename, initrd_base,
+ initrd_max);
+ reset_info->initrd_base = (uint32_t)initrd_base;
+ reset_info->initrd_size = (uint32_t)initrd_size;
+ }
+
+ qemu_register_reset(main_cpu_reset, reset_info);
+}
+
+static QEMUMachine milkymist_machine = {
+ .name = "milkymist",
+ .desc = "Milkymist One",
+ .init = milkymist_init,
+ .is_default = 0
+};
+
+static void milkymist_machine_init(void)
+{
+ qemu_register_machine(&milkymist_machine);
+}
+
+machine_init(milkymist_machine_init);
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-04 23:58:05 +0000