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QEMU-Nyx-fork/hw/ppc/sam460ex.c
BALATON Zoltan 4b387f9ee1 ppc: Add aCube Sam460ex board 
Add emulation of aCube Sam460ex board based on AMCC 460EX embedded SoC.
This is not a complete implementation yet with a lot of components
still missing but enough for the U-Boot firmware to start and to boot
a Linux kernel or AROS.

Signed-off-by: François Revol <revol@free.fr>
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2018-03-06 13:16:29 +11:00

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/*
* QEMU aCube Sam460ex board emulation
*
* Copyright (c) 2012 François Revol
* Copyright (c) 2016-2018 BALATON Zoltan
*
* This file is derived from hw/ppc440_bamboo.c,
* the copyright for that material belongs to the original owners.
*
* This work is licensed under the GNU GPL license version 2 or later.
*
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "qemu/cutils.h"
#include "qemu/error-report.h"
#include "qapi/error.h"
#include "hw/hw.h"
#include "sysemu/blockdev.h"
#include "hw/boards.h"
#include "sysemu/kvm.h"
#include "kvm_ppc.h"
#include "sysemu/device_tree.h"
#include "sysemu/block-backend.h"
#include "hw/loader.h"
#include "elf.h"
#include "exec/address-spaces.h"
#include "exec/memory.h"
#include "hw/ppc/ppc440.h"
#include "hw/ppc/ppc405.h"
#include "hw/block/flash.h"
#include "sysemu/sysemu.h"
#include "sysemu/qtest.h"
#include "hw/sysbus.h"
#include "hw/char/serial.h"
#include "hw/i2c/ppc4xx_i2c.h"
#include "hw/i2c/smbus.h"
#include "hw/usb/hcd-ehci.h"
#define BINARY_DEVICE_TREE_FILE "canyonlands.dtb"
#define UBOOT_FILENAME "u-boot-sam460-20100605.bin"
/* to extract the official U-Boot bin from the updater: */
/* dd bs=1 skip=$(($(stat -c '%s' updater/updater-460) - 0x80000)) \
if=updater/updater-460 of=u-boot-sam460-20100605.bin */
/* from Sam460 U-Boot include/configs/Sam460ex.h */
#define FLASH_BASE 0xfff00000
#define FLASH_BASE_H 0x4
#define FLASH_SIZE (1 << 20)
#define UBOOT_LOAD_BASE 0xfff80000
#define UBOOT_SIZE 0x00080000
#define UBOOT_ENTRY 0xfffffffc
/* from U-Boot */
#define EPAPR_MAGIC (0x45504150)
#define KERNEL_ADDR 0x1000000
#define FDT_ADDR 0x1800000
#define RAMDISK_ADDR 0x1900000
/* Sam460ex IRQ MAP:
IRQ0 = ETH_INT
IRQ1 = FPGA_INT
IRQ2 = PCI_INT (PCIA, PCIB, PCIC, PCIB)
IRQ3 = FPGA_INT2
IRQ11 = RTC_INT
IRQ12 = SM502_INT
*/
#define SDRAM_NR_BANKS 4
/* FIXME: See u-boot.git 8ac41e, also fix in ppc440_uc.c */
static const unsigned int ppc460ex_sdram_bank_sizes[] = {
1024 << 20, 512 << 20, 256 << 20, 128 << 20, 64 << 20, 32 << 20, 0
};
struct boot_info {
uint32_t dt_base;
uint32_t dt_size;
uint32_t entry;
};
/*****************************************************************************/
/* SPD eeprom content from mips_malta.c */
struct _eeprom24c0x_t {
uint8_t tick;
uint8_t address;
uint8_t command;
uint8_t ack;
uint8_t scl;
uint8_t sda;
uint8_t data;
uint8_t contents[256];
};
typedef struct _eeprom24c0x_t eeprom24c0x_t;
static eeprom24c0x_t spd_eeprom = {
.contents = {
/* 00000000: */ 0x80, 0x08, 0xFF, 0x0D, 0x0A, 0xFF, 0x40, 0x00,
/* 00000008: */ 0x04, 0x75, 0x54, 0x00, 0x82, 0x08, 0x00, 0x01,
/* 00000010: */ 0x8F, 0x04, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00,
/* 00000018: */ 0x00, 0x00, 0x00, 0x14, 0x0F, 0x14, 0x2D, 0xFF,
/* 00000020: */ 0x15, 0x08, 0x15, 0x08, 0x00, 0x00, 0x00, 0x00,
/* 00000028: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* 00000030: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* 00000038: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x12, 0xD0,
/* 00000040: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* 00000048: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* 00000050: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* 00000058: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* 00000060: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* 00000068: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* 00000070: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* 00000078: */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x64, 0xF4,
},
};
static void generate_eeprom_spd(uint8_t *eeprom, ram_addr_t ram_size)
{
enum { SDR = 0x4, DDR1 = 0x7, DDR2 = 0x8 } type;
uint8_t *spd = spd_eeprom.contents;
uint8_t nbanks = 0;
uint16_t density = 0;
int i;
/* work in terms of MB */
ram_size >>= 20;
while ((ram_size >= 4) && (nbanks <= 2)) {
int sz_log2 = MIN(31 - clz32(ram_size), 14);
nbanks++;
density |= 1 << (sz_log2 - 2);
ram_size -= 1 << sz_log2;
}
/* split to 2 banks if possible */
if ((nbanks == 1) && (density > 1)) {
nbanks++;
density >>= 1;
}
if (density & 0xff00) {
density = (density & 0xe0) | ((density >> 8) & 0x1f);
type = DDR2;
} else if (!(density & 0x1f)) {
type = DDR2;
} else {
type = SDR;
}
if (ram_size) {
warn_report("SPD cannot represent final " RAM_ADDR_FMT "MB"
" of SDRAM", ram_size);
}
/* fill in SPD memory information */
spd[2] = type;
spd[5] = nbanks;
spd[31] = density;
/* XXX: this is totally random */
spd[9] = 0x10; /* CAS tcyc */
spd[18] = 0x20; /* CAS bit */
spd[23] = 0x10; /* CAS tcyc */
spd[25] = 0x10; /* CAS tcyc */
/* checksum */
spd[63] = 0;
for (i = 0; i < 63; i++) {
spd[63] += spd[i];
}
/* copy for SMBUS */
memcpy(eeprom, spd, sizeof(spd_eeprom.contents));
}
static void generate_eeprom_serial(uint8_t *eeprom)
{
int i, pos = 0;
uint8_t mac[6] = { 0x00 };
uint8_t sn[5] = { 0x01, 0x23, 0x45, 0x67, 0x89 };
/* version */
eeprom[pos++] = 0x01;
/* count */
eeprom[pos++] = 0x02;
/* MAC address */
eeprom[pos++] = 0x01; /* MAC */
eeprom[pos++] = 0x06; /* length */
memcpy(&eeprom[pos], mac, sizeof(mac));
pos += sizeof(mac);
/* serial number */
eeprom[pos++] = 0x02; /* serial */
eeprom[pos++] = 0x05; /* length */
memcpy(&eeprom[pos], sn, sizeof(sn));
pos += sizeof(sn);
/* checksum */
eeprom[pos] = 0;
for (i = 0; i < pos; i++) {
eeprom[pos] += eeprom[i];
}
}
/*****************************************************************************/
static int sam460ex_load_uboot(void)
{
DriveInfo *dinfo;
BlockBackend *blk = NULL;
hwaddr base = FLASH_BASE | ((hwaddr)FLASH_BASE_H << 32);
long bios_size = FLASH_SIZE;
int fl_sectors;
dinfo = drive_get(IF_PFLASH, 0, 0);
if (dinfo) {
blk = blk_by_legacy_dinfo(dinfo);
bios_size = blk_getlength(blk);
}
fl_sectors = (bios_size + 65535) >> 16;
if (!pflash_cfi01_register(base, NULL, "sam460ex.flash", bios_size,
blk, (64 * 1024), fl_sectors,
1, 0x89, 0x18, 0x0000, 0x0, 1)) {
error_report("qemu: Error registering flash memory.");
/* XXX: return an error instead? */
exit(1);
}
if (!blk) {
/*error_report("No flash image given with the 'pflash' parameter,"
" using default u-boot image");*/
base = UBOOT_LOAD_BASE | ((hwaddr)FLASH_BASE_H << 32);
rom_add_file_fixed(UBOOT_FILENAME, base, -1);
}
return 0;
}
static int sam460ex_load_device_tree(hwaddr addr,
uint32_t ramsize,
hwaddr initrd_base,
hwaddr initrd_size,
const char *kernel_cmdline)
{
int ret = -1;
uint32_t mem_reg_property[] = { 0, 0, cpu_to_be32(ramsize) };
char *filename;
int fdt_size;
void *fdt;
uint32_t tb_freq = 50000000;
uint32_t clock_freq = 50000000;
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
if (!filename) {
goto out;
}
fdt = load_device_tree(filename, &fdt_size);
g_free(filename);
if (fdt == NULL) {
goto out;
}
/* Manipulate device tree in memory. */
ret = qemu_fdt_setprop(fdt, "/memory", "reg", mem_reg_property,
sizeof(mem_reg_property));
if (ret < 0) {
error_report("couldn't set /memory/reg");
}
/* default FDT doesn't have a /chosen node... */
qemu_fdt_add_subnode(fdt, "/chosen");
ret = qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start",
initrd_base);
if (ret < 0) {
error_report("couldn't set /chosen/linux,initrd-start");
}
ret = qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
(initrd_base + initrd_size));
if (ret < 0) {
error_report("couldn't set /chosen/linux,initrd-end");
}
ret = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs",
kernel_cmdline);
if (ret < 0) {
error_report("couldn't set /chosen/bootargs");
}
/* Copy data from the host device tree into the guest. Since the guest can
* directly access the timebase without host involvement, we must expose
* the correct frequencies. */
if (kvm_enabled()) {
tb_freq = kvmppc_get_tbfreq();
clock_freq = kvmppc_get_clockfreq();
}
qemu_fdt_setprop_cell(fdt, "/cpus/cpu@0", "clock-frequency",
clock_freq);
qemu_fdt_setprop_cell(fdt, "/cpus/cpu@0", "timebase-frequency",
tb_freq);
rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr);
g_free(fdt);
ret = fdt_size;
out:
return ret;
}
/* Create reset TLB entries for BookE, mapping only the flash memory. */
static void mmubooke_create_initial_mapping_uboot(CPUPPCState *env)
{
ppcemb_tlb_t *tlb = &env->tlb.tlbe[0];
/* on reset the flash is mapped by a shadow TLB,
* but since we don't implement them we need to use
* the same values U-Boot will use to avoid a fault.
*/
tlb->attr = 0;
tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
tlb->size = 0x10000000; /* up to 0xffffffff */
tlb->EPN = 0xf0000000 & TARGET_PAGE_MASK;
tlb->RPN = (0xf0000000 & TARGET_PAGE_MASK) | 0x4;
tlb->PID = 0;
}
/* Create reset TLB entries for BookE, spanning the 32bit addr space. */
static void mmubooke_create_initial_mapping(CPUPPCState *env,
target_ulong va,
hwaddr pa)
{
ppcemb_tlb_t *tlb = &env->tlb.tlbe[0];
tlb->attr = 0;
tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
tlb->size = 1 << 31; /* up to 0x80000000 */
tlb->EPN = va & TARGET_PAGE_MASK;
tlb->RPN = pa & TARGET_PAGE_MASK;
tlb->PID = 0;
}
static void main_cpu_reset(void *opaque)
{
PowerPCCPU *cpu = opaque;
CPUPPCState *env = &cpu->env;
struct boot_info *bi = env->load_info;
cpu_reset(CPU(cpu));
/* either we have a kernel to boot or we jump to U-Boot */
if (bi->entry != UBOOT_ENTRY) {
env->gpr[1] = (16 << 20) - 8;
env->gpr[3] = FDT_ADDR;
env->nip = bi->entry;
/* Create a mapping for the kernel. */
mmubooke_create_initial_mapping(env, 0, 0);
env->gpr[6] = tswap32(EPAPR_MAGIC);
env->gpr[7] = (16 << 20) - 8; /*bi->ima_size;*/
} else {
env->nip = UBOOT_ENTRY;
mmubooke_create_initial_mapping_uboot(env);
}
}
static void sam460ex_init(MachineState *machine)
{
MemoryRegion *address_space_mem = get_system_memory();
MemoryRegion *isa = g_new(MemoryRegion, 1);
MemoryRegion *ram_memories = g_new(MemoryRegion, SDRAM_NR_BANKS);
hwaddr ram_bases[SDRAM_NR_BANKS];
hwaddr ram_sizes[SDRAM_NR_BANKS];
MemoryRegion *l2cache_ram = g_new(MemoryRegion, 1);
qemu_irq *irqs, *uic[4];
PCIBus *pci_bus;
PowerPCCPU *cpu;
CPUPPCState *env;
PPC4xxI2CState *i2c[2];
hwaddr entry = UBOOT_ENTRY;
hwaddr loadaddr = 0;
target_long initrd_size = 0;
DeviceState *dev;
SysBusDevice *sbdev;
int success;
int i;
struct boot_info *boot_info;
const size_t smbus_eeprom_size = 8 * 256;
uint8_t *smbus_eeprom_buf = g_malloc0(smbus_eeprom_size);
cpu = POWERPC_CPU(cpu_create(machine->cpu_type));
env = &cpu->env;
if (env->mmu_model != POWERPC_MMU_BOOKE) {
error_report("Only MMU model BookE is supported by this machine.");
exit(1);
}
#ifdef TARGET_PPCEMB
if (!qtest_enabled()) {
warn_report("qemu-system-ppcemb is deprecated, "
"please use qemu-system-ppc instead.");
}
#endif
qemu_register_reset(main_cpu_reset, cpu);
boot_info = g_malloc0(sizeof(*boot_info));
env->load_info = boot_info;
ppc_booke_timers_init(cpu, 50000000, 0);
ppc_dcr_init(env, NULL, NULL);
/* PLB arbitrer */
ppc4xx_plb_init(env);
/* interrupt controllers */
irqs = g_malloc0(sizeof(*irqs) * PPCUIC_OUTPUT_NB);
irqs[PPCUIC_OUTPUT_INT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_INT];
irqs[PPCUIC_OUTPUT_CINT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_CINT];
uic[0] = ppcuic_init(env, irqs, 0xc0, 0, 1);
uic[1] = ppcuic_init(env, &uic[0][30], 0xd0, 0, 1);
uic[2] = ppcuic_init(env, &uic[0][10], 0xe0, 0, 1);
uic[3] = ppcuic_init(env, &uic[0][16], 0xf0, 0, 1);
/* SDRAM controller */
memset(ram_bases, 0, sizeof(ram_bases));
memset(ram_sizes, 0, sizeof(ram_sizes));
/* put all RAM on first bank because board has one slot
* and firmware only checks that */
machine->ram_size = ppc4xx_sdram_adjust(machine->ram_size, 1,
ram_memories, ram_bases, ram_sizes,
ppc460ex_sdram_bank_sizes);
/* FIXME: does 460EX have ECC interrupts? */
ppc440_sdram_init(env, SDRAM_NR_BANKS, ram_memories,
ram_bases, ram_sizes, 1);
/* generate SPD EEPROM data */
for (i = 0; i < SDRAM_NR_BANKS; i++) {
generate_eeprom_spd(&smbus_eeprom_buf[i * 256], ram_sizes[i]);
}
generate_eeprom_serial(&smbus_eeprom_buf[4 * 256]);
generate_eeprom_serial(&smbus_eeprom_buf[6 * 256]);
/* IIC controllers */
dev = sysbus_create_simple(TYPE_PPC4xx_I2C, 0x4ef600700, uic[0][2]);
i2c[0] = PPC4xx_I2C(dev);
object_property_set_bool(OBJECT(dev), true, "realized", NULL);
smbus_eeprom_init(i2c[0]->bus, 8, smbus_eeprom_buf, smbus_eeprom_size);
g_free(smbus_eeprom_buf);
dev = sysbus_create_simple(TYPE_PPC4xx_I2C, 0x4ef600800, uic[0][3]);
i2c[1] = PPC4xx_I2C(dev);
/* External bus controller */
ppc405_ebc_init(env);
/* CPR */
ppc4xx_cpr_init(env);
/* PLB to AHB bridge */
ppc4xx_ahb_init(env);
/* System DCRs */
ppc4xx_sdr_init(env);
/* MAL */
ppc4xx_mal_init(env, 4, 16, &uic[2][3]);
/* 256K of L2 cache as memory */
ppc4xx_l2sram_init(env);
/* FIXME: remove this after fixing l2sram mapping in ppc440_uc.c? */
memory_region_init_ram(l2cache_ram, NULL, "ppc440.l2cache_ram", 256 << 10,
&error_abort);
memory_region_add_subregion(address_space_mem, 0x400000000LL, l2cache_ram);
/* USB */
sysbus_create_simple(TYPE_PPC4xx_EHCI, 0x4bffd0400, uic[2][29]);
dev = qdev_create(NULL, "sysbus-ohci");
qdev_prop_set_string(dev, "masterbus", "usb-bus.0");
qdev_prop_set_uint32(dev, "num-ports", 6);
qdev_init_nofail(dev);
sbdev = SYS_BUS_DEVICE(dev);
sysbus_mmio_map(sbdev, 0, 0x4bffd0000);
sysbus_connect_irq(sbdev, 0, uic[2][30]);
usb_create_simple(usb_bus_find(-1), "usb-kbd");
usb_create_simple(usb_bus_find(-1), "usb-mouse");
/* PCI bus */
ppc460ex_pcie_init(env);
/* FIXME: is this correct? */
dev = sysbus_create_varargs("ppc440-pcix-host", 0xc0ec00000,
uic[1][0], uic[1][20], uic[1][21], uic[1][22],
NULL);
pci_bus = (PCIBus *)qdev_get_child_bus(dev, "pci.0");
if (!pci_bus) {
error_report("couldn't create PCI controller!");
exit(1);
}
memory_region_init_alias(isa, NULL, "isa_mmio", get_system_io(),
0, 0x10000);
memory_region_add_subregion(get_system_memory(), 0xc08000000, isa);
/* PCI devices */
pci_create_simple(pci_bus, PCI_DEVFN(6, 0), "sm501");
/* SoC has a single SATA port but we don't emulate that yet
* However, firmware and usual clients have driver for SiI311x
* so add one for convenience by default */
if (defaults_enabled()) {
pci_create_simple(pci_bus, -1, "sii3112");
}
/* SoC has 4 UARTs
* but board has only one wired and two are present in fdt */
if (serial_hds[0] != NULL) {
serial_mm_init(address_space_mem, 0x4ef600300, 0, uic[1][1],
PPC_SERIAL_MM_BAUDBASE, serial_hds[0],
DEVICE_BIG_ENDIAN);
}
if (serial_hds[1] != NULL) {
serial_mm_init(address_space_mem, 0x4ef600400, 0, uic[0][1],
PPC_SERIAL_MM_BAUDBASE, serial_hds[1],
DEVICE_BIG_ENDIAN);
}
/* Load U-Boot image. */
if (!machine->kernel_filename) {
success = sam460ex_load_uboot();
if (success < 0) {
error_report("qemu: could not load firmware");
exit(1);
}
}
/* Load kernel. */
if (machine->kernel_filename) {
success = load_uimage(machine->kernel_filename, &entry, &loadaddr,
NULL, NULL, NULL);
if (success < 0) {
uint64_t elf_entry, elf_lowaddr;
success = load_elf(machine->kernel_filename, NULL, NULL, &elf_entry,
&elf_lowaddr, NULL, 1, PPC_ELF_MACHINE, 0, 0);
entry = elf_entry;
loadaddr = elf_lowaddr;
}
/* XXX try again as binary */
if (success < 0) {
error_report("qemu: could not load kernel '%s'",
machine->kernel_filename);
exit(1);
}
}
/* Load initrd. */
if (machine->initrd_filename) {
initrd_size = load_image_targphys(machine->initrd_filename,
RAMDISK_ADDR,
machine->ram_size - RAMDISK_ADDR);
if (initrd_size < 0) {
error_report("qemu: could not load ram disk '%s' at %x",
machine->initrd_filename, RAMDISK_ADDR);
exit(1);
}
}
/* If we're loading a kernel directly, we must load the device tree too. */
if (machine->kernel_filename) {
int dt_size;
dt_size = sam460ex_load_device_tree(FDT_ADDR, machine->ram_size,
RAMDISK_ADDR, initrd_size,
machine->kernel_cmdline);
if (dt_size < 0) {
error_report("couldn't load device tree");
exit(1);
}
boot_info->dt_base = FDT_ADDR;
boot_info->dt_size = dt_size;
}
boot_info->entry = entry;
}
static void sam460ex_machine_init(MachineClass *mc)
{
mc->desc = "aCube Sam460ex";
mc->init = sam460ex_init;
mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("460exb");
mc->default_ram_size = 512 * M_BYTE;
}
DEFINE_MACHINE("sam460ex", sam460ex_machine_init)
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