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/*
* Model of Petalogix linux reference design targeting Xilinx Spartan 3ADSP-1800
* boards.
*
* Copyright (c) 2009 Edgar E. Iglesias.
*
* 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.
*/
#include "sysbus.h"
#include "hw.h"
#include "net.h"
#include "flash.h"
#include "sysemu.h"
#include "devices.h"
#include "boards.h"
#include "device_tree.h"
#include "xilinx.h"
#define LMB_BRAM_SIZE (128 * 1024)
#define FLASH_SIZE (16 * 1024 * 1024)
static uint32_t bootstrap_pc;
static void main_cpu_reset(void *opaque)
{
CPUState *env = opaque;
cpu_reset(env);
env->sregs[SR_PC] = bootstrap_pc;
}
#define BINARY_DEVICE_TREE_FILE "petalogix-s3adsp1800.dtb"
static int petalogix_load_device_tree(target_phys_addr_t addr,
uint32_t ramsize,
target_phys_addr_t initrd_base,
target_phys_addr_t initrd_size,
const char *kernel_cmdline)
{
char *path;
int fdt_size;
#ifdef CONFIG_FDT
void *fdt;
int r;
/* Try the local "mb.dtb" override. */
fdt = load_device_tree("mb.dtb", &fdt_size);
if (!fdt) {
path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
if (path) {
fdt = load_device_tree(path, &fdt_size);
qemu_free(path);
}
if (!fdt)
return 0;
}
r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline);
if (r < 0)
fprintf(stderr, "couldn't set /chosen/bootargs\n");
cpu_physical_memory_write (addr, (void *)fdt, fdt_size);
#else
/* We lack libfdt so we cannot manipulate the fdt. Just pass on the blob
to the kernel. */
fdt_size = load_image_targphys("mb.dtb", addr, 0x10000);
if (fdt_size < 0) {
path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
if (path) {
fdt_size = load_image_targphys(path, addr, 0x10000);
qemu_free(path);
}
}
if (kernel_cmdline) {
fprintf(stderr,
"Warning: missing libfdt, cannot pass cmdline to kernel!\n");
}
#endif
return fdt_size;
}
static void
petalogix_s3adsp1800_init(ram_addr_t ram_size,
const char *boot_device,
const char *kernel_filename,
const char *kernel_cmdline,
const char *initrd_filename, const char *cpu_model)
{
DeviceState *dev;
CPUState *env;
int kernel_size;
DriveInfo *dinfo;
int i;
target_phys_addr_t ddr_base = 0x90000000;
ram_addr_t phys_lmb_bram;
ram_addr_t phys_ram;
ram_addr_t phys_flash;
qemu_irq irq[32], *cpu_irq;
/* init CPUs */
if (cpu_model == NULL) {
cpu_model = "microblaze";
}
env = cpu_init(cpu_model);
env->pvr.regs[10] = 0x0c000000; /* spartan 3a dsp family. */
qemu_register_reset(main_cpu_reset, env);
/* Attach emulated BRAM through the LMB. */
phys_lmb_bram = qemu_ram_alloc(LMB_BRAM_SIZE);
cpu_register_physical_memory(0x00000000, LMB_BRAM_SIZE,
phys_lmb_bram | IO_MEM_RAM);
phys_ram = qemu_ram_alloc(ram_size);
cpu_register_physical_memory(ddr_base, ram_size, phys_ram | IO_MEM_RAM);
phys_flash = qemu_ram_alloc(FLASH_SIZE);
dinfo = drive_get(IF_PFLASH, 0, 0);
pflash_cfi02_register(0xa0000000, phys_flash,
dinfo ? dinfo->bdrv : NULL, (64 * 1024),
FLASH_SIZE >> 16,
1, 1, 0x0000, 0x0000, 0x0000, 0x0000,
0x555, 0x2aa);
cpu_irq = microblaze_pic_init_cpu(env);
dev = xilinx_intc_create(0x81800000, cpu_irq[0], 2);
for (i = 0; i < 32; i++) {
irq[i] = qdev_get_gpio_in(dev, i);
}
sysbus_create_simple("xilinx,uartlite", 0x84000000, irq[3]);
/* 2 timers at irq 2 @ 62 Mhz. */
xilinx_timer_create(0x83c00000, irq[0], 2, 62 * 1000000);
xilinx_ethlite_create(&nd_table[0], 0x81000000, irq[1], 0, 0);
if (kernel_filename) {
uint64_t entry, low, high;
int kcmdline_len;
uint32_t base32;
/* Boots a kernel elf binary. */
kernel_size = load_elf(kernel_filename, 0,
&entry, &low, &high);
base32 = entry;
if (base32 == 0xc0000000) {
kernel_size = load_elf(kernel_filename, -0x30000000LL,
&entry, NULL, NULL);
}
/* Always boot into physical ram. */
bootstrap_pc = ddr_base + (entry & 0x0fffffff);
if (kernel_size < 0) {
/* If we failed loading ELF's try a raw image. */
kernel_size = load_image_targphys(kernel_filename, ddr_base,
ram_size);
bootstrap_pc = ddr_base;
}
env->regs[5] = ddr_base + kernel_size;
if (kernel_cmdline && (kcmdline_len = strlen(kernel_cmdline))) {
pstrcpy_targphys(env->regs[5], 256, kernel_cmdline);
}
env->regs[6] = 0;
/* Provide a device-tree. */
env->regs[7] = ddr_base + kernel_size + 256;
petalogix_load_device_tree(env->regs[7], ram_size,
env->regs[6], 0,
kernel_cmdline);
}
env->sregs[SR_PC] = bootstrap_pc;
}
static QEMUMachine petalogix_s3adsp1800_machine = {
.name = "petalogix-s3adsp1800",
.desc = "Petalogix linux refdesign for xilinx Spartan 3ADSP1800",
.init = petalogix_s3adsp1800_init,
.is_default = 1
};
static void petalogix_s3adsp1800_machine_init(void)
{
qemu_register_machine(&petalogix_s3adsp1800_machine);
}
machine_init(petalogix_s3adsp1800_machine_init);
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