sun4m.c
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/*
* QEMU Sun4m System Emulator
*
* Copyright (c) 2003-2004 Fabrice Bellard
*
* 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 "vl.h"
#include "m48t08.h"
#define KERNEL_LOAD_ADDR 0x00004000
#define MMU_CONTEXT_TBL 0x00003000
#define MMU_L1PTP (MMU_CONTEXT_TBL + 0x0400)
#define MMU_L2PTP (MMU_CONTEXT_TBL + 0x0800)
#define ROMVEC_DATA (MMU_CONTEXT_TBL + 0x1800)
#define PROM_ADDR 0xffd04000
#define PROM_FILENAME "proll.bin"
#define PHYS_JJ_EEPROM 0x71200000 /* [2000] MK48T08 */
#define PHYS_JJ_IDPROM_OFF 0x1FD8
#define PHYS_JJ_EEPROM_SIZE 0x2000
/* TSC handling */
uint64_t cpu_get_tsc()
{
return qemu_get_clock(vm_clock);
}
void DMA_run() {}
void SB16_run() {}
void vga_invalidate_display() {}
void vga_screen_dump(const char *filename) {}
int serial_can_receive(SerialState *s) { return 0; }
void serial_receive_byte(SerialState *s, int ch) {}
void serial_receive_break(SerialState *s) {}
static m48t08_t *nvram;
/* Sun4m hardware initialisation */
void sun4m_init(int ram_size, int vga_ram_size, int boot_device,
DisplayState *ds, const char **fd_filename, int snapshot,
const char *kernel_filename, const char *kernel_cmdline,
const char *initrd_filename)
{
char buf[1024];
int ret, linux_boot, bios_size;
unsigned long bios_offset;
linux_boot = (kernel_filename != NULL);
/* allocate RAM */
cpu_register_physical_memory(0, ram_size, 0);
bios_offset = ram_size;
iommu_init();
sched_init();
tcx_init(ds);
lance_init(&nd_table[0], 6);
nvram = m48t08_init(PHYS_JJ_EEPROM, PHYS_JJ_EEPROM_SIZE);
magic_init(kernel_filename, phys_ram_base + KERNEL_LOAD_ADDR);
#if 0
snprintf(buf, sizeof(buf), "%s/%s", bios_dir, PROM_FILENAME);
bios_size = get_image_size(buf);
ret = load_image(buf, phys_ram_base + bios_offset);
if (ret != bios_size) {
fprintf(stderr, "qemu: could not load prom '%s'\n", buf);
exit(1);
}
cpu_register_physical_memory(PROM_ADDR,
bios_size, bios_offset | IO_MEM_ROM);
#endif
/* We load Proll as the kernel and start it. It will issue a magic
IO to load the real kernel */
if (linux_boot) {
snprintf(buf, sizeof(buf), "%s/%s", bios_dir, PROM_FILENAME);
ret = load_kernel(buf,
phys_ram_base + KERNEL_LOAD_ADDR);
if (ret < 0) {
fprintf(stderr, "qemu: could not load kernel '%s'\n",
buf);
exit(1);
}
}
/* Setup a MMU entry for entire address space */
stl_raw(phys_ram_base + MMU_CONTEXT_TBL, (MMU_L1PTP >> 4) | 1);
stl_raw(phys_ram_base + MMU_L1PTP, (MMU_L2PTP >> 4) | 1);
#if 0
stl_raw(phys_ram_base + MMU_L1PTP + (0x50 << 2), (MMU_L2PTP >> 4) | 1); // frame buffer at 50..
#endif
stl_raw(phys_ram_base + MMU_L1PTP + (0xff << 2), (MMU_L2PTP >> 4) | 1); // ff.. == 00..
/* 3 = U:RWX S:RWX */
stl_raw(phys_ram_base + MMU_L2PTP, (3 << PTE_ACCESS_SHIFT) | 2);
#if 0
stl_raw(phys_ram_base + MMU_L2PTP + 0x84, (PHYS_JJ_TCX_FB >> 4) \
| (3 << PTE_ACCESS_SHIFT) | 2); // frame buf
stl_raw(phys_ram_base + MMU_L2PTP + 0x88, (PHYS_JJ_TCX_FB >> 4) \
| (3 << PTE_ACCESS_SHIFT) | 2); // frame buf
stl_raw(phys_ram_base + MMU_L2PTP + 0x140, (PHYS_JJ_TCX_FB >> 4) \
| (3 << PTE_ACCESS_SHIFT) | 2); // frame buf
// "Empirical constant"
stl_raw(phys_ram_base + ROMVEC_DATA, 0x10010407);
// Version: V3 prom
stl_raw(phys_ram_base + ROMVEC_DATA + 4, 3);
stl_raw(phys_ram_base + ROMVEC_DATA + 0x1c, ROMVEC_DATA+0x400);
stl_raw(phys_ram_base + ROMVEC_DATA + 0x400, ROMVEC_DATA+0x404);
stl_raw(phys_ram_base + ROMVEC_DATA + 0x404, 0x81c3e008); // retl
stl_raw(phys_ram_base + ROMVEC_DATA + 0x408, 0x01000000); // nop
#endif
}