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qemu-e2k/hw/arm/aspeed.c
Joel Stanley b6e70d1d7f hw/arm/aspeed: Unlock SCU when running kernel 
The ASPEED hardware contains a lock register for the SCU that disables
any writes to the SCU when it is locked. The machine comes up with the
lock enabled, but on all known hardware u-boot will unlock it and leave
it unlocked when loading the kernel.

This means the kernel expects the SCU to be unlocked. When booting from
an emulated ROM the normal u-boot unlock path is executed. Things don't
go well when booting using the -kernel command line, as u-boot does not
run first.

Change behaviour so that when a kernel is passed to the machine, set the
reset value of the SCU to be unlocked.

Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-id: 20171114122018.12204-1-joel@jms.id.au
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-11-20 13:47:49 +00:00

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/*
* OpenPOWER Palmetto BMC
*
* Andrew Jeffery <andrew@aj.id.au>
*
* Copyright 2016 IBM Corp.
*
* This code is licensed under the GPL version 2 or later. See
* the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu-common.h"
#include "cpu.h"
#include "exec/address-spaces.h"
#include "hw/arm/arm.h"
#include "hw/arm/aspeed_soc.h"
#include "hw/boards.h"
#include "qemu/log.h"
#include "sysemu/block-backend.h"
#include "sysemu/blockdev.h"
#include "hw/loader.h"
#include "qemu/error-report.h"
static struct arm_boot_info aspeed_board_binfo = {
.board_id = -1, /* device-tree-only board */
.nb_cpus = 1,
};
typedef struct AspeedBoardState {
AspeedSoCState soc;
MemoryRegion ram;
} AspeedBoardState;
typedef struct AspeedBoardConfig {
const char *soc_name;
uint32_t hw_strap1;
const char *fmc_model;
const char *spi_model;
uint32_t num_cs;
void (*i2c_init)(AspeedBoardState *bmc);
} AspeedBoardConfig;
enum {
PALMETTO_BMC,
AST2500_EVB,
ROMULUS_BMC,
};
/* Palmetto hardware value: 0x120CE416 */
#define PALMETTO_BMC_HW_STRAP1 ( \
SCU_AST2400_HW_STRAP_DRAM_SIZE(DRAM_SIZE_256MB) | \
SCU_AST2400_HW_STRAP_DRAM_CONFIG(2 /* DDR3 with CL=6, CWL=5 */) | \
SCU_AST2400_HW_STRAP_ACPI_DIS | \
SCU_AST2400_HW_STRAP_SET_CLK_SOURCE(AST2400_CLK_48M_IN) | \
SCU_HW_STRAP_VGA_CLASS_CODE | \
SCU_HW_STRAP_LPC_RESET_PIN | \
SCU_HW_STRAP_SPI_MODE(SCU_HW_STRAP_SPI_M_S_EN) | \
SCU_AST2400_HW_STRAP_SET_CPU_AHB_RATIO(AST2400_CPU_AHB_RATIO_2_1) | \
SCU_HW_STRAP_SPI_WIDTH | \
SCU_HW_STRAP_VGA_SIZE_SET(VGA_16M_DRAM) | \
SCU_AST2400_HW_STRAP_BOOT_MODE(AST2400_SPI_BOOT))
/* AST2500 evb hardware value: 0xF100C2E6 */
#define AST2500_EVB_HW_STRAP1 (( \
AST2500_HW_STRAP1_DEFAULTS | \
SCU_AST2500_HW_STRAP_SPI_AUTOFETCH_ENABLE | \
SCU_AST2500_HW_STRAP_GPIO_STRAP_ENABLE | \
SCU_AST2500_HW_STRAP_UART_DEBUG | \
SCU_AST2500_HW_STRAP_DDR4_ENABLE | \
SCU_HW_STRAP_MAC1_RGMII | \
SCU_HW_STRAP_MAC0_RGMII) & \
~SCU_HW_STRAP_2ND_BOOT_WDT)
/* Romulus hardware value: 0xF10AD206 */
#define ROMULUS_BMC_HW_STRAP1 ( \
AST2500_HW_STRAP1_DEFAULTS | \
SCU_AST2500_HW_STRAP_SPI_AUTOFETCH_ENABLE | \
SCU_AST2500_HW_STRAP_GPIO_STRAP_ENABLE | \
SCU_AST2500_HW_STRAP_UART_DEBUG | \
SCU_AST2500_HW_STRAP_DDR4_ENABLE | \
SCU_AST2500_HW_STRAP_ACPI_ENABLE | \
SCU_HW_STRAP_SPI_MODE(SCU_HW_STRAP_SPI_MASTER))
static void palmetto_bmc_i2c_init(AspeedBoardState *bmc);
static void ast2500_evb_i2c_init(AspeedBoardState *bmc);
static const AspeedBoardConfig aspeed_boards[] = {
[PALMETTO_BMC] = {
.soc_name = "ast2400-a1",
.hw_strap1 = PALMETTO_BMC_HW_STRAP1,
.fmc_model = "n25q256a",
.spi_model = "mx25l25635e",
.num_cs = 1,
.i2c_init = palmetto_bmc_i2c_init,
},
[AST2500_EVB] = {
.soc_name = "ast2500-a1",
.hw_strap1 = AST2500_EVB_HW_STRAP1,
.fmc_model = "n25q256a",
.spi_model = "mx25l25635e",
.num_cs = 1,
.i2c_init = ast2500_evb_i2c_init,
},
[ROMULUS_BMC] = {
.soc_name = "ast2500-a1",
.hw_strap1 = ROMULUS_BMC_HW_STRAP1,
.fmc_model = "n25q256a",
.spi_model = "mx66l1g45g",
.num_cs = 2,
},
};
#define FIRMWARE_ADDR 0x0
static void write_boot_rom(DriveInfo *dinfo, hwaddr addr, size_t rom_size,
Error **errp)
{
BlockBackend *blk = blk_by_legacy_dinfo(dinfo);
uint8_t *storage;
int64_t size;
/* The block backend size should have already been 'validated' by
* the creation of the m25p80 object.
*/
size = blk_getlength(blk);
if (size <= 0) {
error_setg(errp, "failed to get flash size");
return;
}
if (rom_size > size) {
rom_size = size;
}
storage = g_new0(uint8_t, rom_size);
if (blk_pread(blk, 0, storage, rom_size) < 0) {
error_setg(errp, "failed to read the initial flash content");
return;
}
rom_add_blob_fixed("aspeed.boot_rom", storage, rom_size, addr);
g_free(storage);
}
static void aspeed_board_init_flashes(AspeedSMCState *s, const char *flashtype,
Error **errp)
{
int i ;
for (i = 0; i < s->num_cs; ++i) {
AspeedSMCFlash *fl = &s->flashes[i];
DriveInfo *dinfo = drive_get_next(IF_MTD);
qemu_irq cs_line;
fl->flash = ssi_create_slave_no_init(s->spi, flashtype);
if (dinfo) {
qdev_prop_set_drive(fl->flash, "drive", blk_by_legacy_dinfo(dinfo),
errp);
}
qdev_init_nofail(fl->flash);
cs_line = qdev_get_gpio_in_named(fl->flash, SSI_GPIO_CS, 0);
sysbus_connect_irq(SYS_BUS_DEVICE(s), i + 1, cs_line);
}
}
static void aspeed_board_init(MachineState *machine,
const AspeedBoardConfig *cfg)
{
AspeedBoardState *bmc;
AspeedSoCClass *sc;
DriveInfo *drive0 = drive_get(IF_MTD, 0, 0);
bmc = g_new0(AspeedBoardState, 1);
object_initialize(&bmc->soc, (sizeof(bmc->soc)), cfg->soc_name);
object_property_add_child(OBJECT(machine), "soc", OBJECT(&bmc->soc),
&error_abort);
sc = ASPEED_SOC_GET_CLASS(&bmc->soc);
object_property_set_uint(OBJECT(&bmc->soc), ram_size, "ram-size",
&error_abort);
object_property_set_int(OBJECT(&bmc->soc), cfg->hw_strap1, "hw-strap1",
&error_abort);
object_property_set_int(OBJECT(&bmc->soc), cfg->num_cs, "num-cs",
&error_abort);
if (machine->kernel_filename) {
/*
* When booting with a -kernel command line there is no u-boot
* that runs to unlock the SCU. In this case set the default to
* be unlocked as the kernel expects
*/
object_property_set_int(OBJECT(&bmc->soc), ASPEED_SCU_PROT_KEY,
"hw-prot-key", &error_abort);
}
object_property_set_bool(OBJECT(&bmc->soc), true, "realized",
&error_abort);
/*
* Allocate RAM after the memory controller has checked the size
* was valid. If not, a default value is used.
*/
ram_size = object_property_get_uint(OBJECT(&bmc->soc), "ram-size",
&error_abort);
memory_region_allocate_system_memory(&bmc->ram, NULL, "ram", ram_size);
memory_region_add_subregion(get_system_memory(), sc->info->sdram_base,
&bmc->ram);
object_property_add_const_link(OBJECT(&bmc->soc), "ram", OBJECT(&bmc->ram),
&error_abort);
aspeed_board_init_flashes(&bmc->soc.fmc, cfg->fmc_model, &error_abort);
aspeed_board_init_flashes(&bmc->soc.spi[0], cfg->spi_model, &error_abort);
/* Install first FMC flash content as a boot rom. */
if (drive0) {
AspeedSMCFlash *fl = &bmc->soc.fmc.flashes[0];
MemoryRegion *boot_rom = g_new(MemoryRegion, 1);
/*
* create a ROM region using the default mapping window size of
* the flash module. The window size is 64MB for the AST2400
* SoC and 128MB for the AST2500 SoC, which is twice as big as
* needed by the flash modules of the Aspeed machines.
*/
memory_region_init_rom_nomigrate(boot_rom, OBJECT(bmc), "aspeed.boot_rom",
fl->size, &error_abort);
memory_region_add_subregion(get_system_memory(), FIRMWARE_ADDR,
boot_rom);
write_boot_rom(drive0, FIRMWARE_ADDR, fl->size, &error_abort);
}
aspeed_board_binfo.kernel_filename = machine->kernel_filename;
aspeed_board_binfo.initrd_filename = machine->initrd_filename;
aspeed_board_binfo.kernel_cmdline = machine->kernel_cmdline;
aspeed_board_binfo.ram_size = ram_size;
aspeed_board_binfo.loader_start = sc->info->sdram_base;
if (cfg->i2c_init) {
cfg->i2c_init(bmc);
}
arm_load_kernel(ARM_CPU(first_cpu), &aspeed_board_binfo);
}
static void palmetto_bmc_i2c_init(AspeedBoardState *bmc)
{
AspeedSoCState *soc = &bmc->soc;
DeviceState *dev;
/* The palmetto platform expects a ds3231 RTC but a ds1338 is
* enough to provide basic RTC features. Alarms will be missing */
i2c_create_slave(aspeed_i2c_get_bus(DEVICE(&soc->i2c), 0), "ds1338", 0x68);
/* add a TMP423 temperature sensor */
dev = i2c_create_slave(aspeed_i2c_get_bus(DEVICE(&soc->i2c), 2),
"tmp423", 0x4c);
object_property_set_int(OBJECT(dev), 31000, "temperature0", &error_abort);
object_property_set_int(OBJECT(dev), 28000, "temperature1", &error_abort);
object_property_set_int(OBJECT(dev), 20000, "temperature2", &error_abort);
object_property_set_int(OBJECT(dev), 110000, "temperature3", &error_abort);
}
static void palmetto_bmc_init(MachineState *machine)
{
aspeed_board_init(machine, &aspeed_boards[PALMETTO_BMC]);
}
static void palmetto_bmc_class_init(ObjectClass *oc, void *data)
{
MachineClass *mc = MACHINE_CLASS(oc);
mc->desc = "OpenPOWER Palmetto BMC (ARM926EJ-S)";
mc->init = palmetto_bmc_init;
mc->max_cpus = 1;
mc->no_sdcard = 1;
mc->no_floppy = 1;
mc->no_cdrom = 1;
mc->no_parallel = 1;
mc->ignore_memory_transaction_failures = true;
}
static const TypeInfo palmetto_bmc_type = {
.name = MACHINE_TYPE_NAME("palmetto-bmc"),
.parent = TYPE_MACHINE,
.class_init = palmetto_bmc_class_init,
};
static void ast2500_evb_i2c_init(AspeedBoardState *bmc)
{
AspeedSoCState *soc = &bmc->soc;
/* The AST2500 EVB expects a LM75 but a TMP105 is compatible */
i2c_create_slave(aspeed_i2c_get_bus(DEVICE(&soc->i2c), 7), "tmp105", 0x4d);
}
static void ast2500_evb_init(MachineState *machine)
{
aspeed_board_init(machine, &aspeed_boards[AST2500_EVB]);
}
static void ast2500_evb_class_init(ObjectClass *oc, void *data)
{
MachineClass *mc = MACHINE_CLASS(oc);
mc->desc = "Aspeed AST2500 EVB (ARM1176)";
mc->init = ast2500_evb_init;
mc->max_cpus = 1;
mc->no_sdcard = 1;
mc->no_floppy = 1;
mc->no_cdrom = 1;
mc->no_parallel = 1;
mc->ignore_memory_transaction_failures = true;
}
static const TypeInfo ast2500_evb_type = {
.name = MACHINE_TYPE_NAME("ast2500-evb"),
.parent = TYPE_MACHINE,
.class_init = ast2500_evb_class_init,
};
static void romulus_bmc_init(MachineState *machine)
{
aspeed_board_init(machine, &aspeed_boards[ROMULUS_BMC]);
}
static void romulus_bmc_class_init(ObjectClass *oc, void *data)
{
MachineClass *mc = MACHINE_CLASS(oc);
mc->desc = "OpenPOWER Romulus BMC (ARM1176)";
mc->init = romulus_bmc_init;
mc->max_cpus = 1;
mc->no_sdcard = 1;
mc->no_floppy = 1;
mc->no_cdrom = 1;
mc->no_parallel = 1;
mc->ignore_memory_transaction_failures = true;
}
static const TypeInfo romulus_bmc_type = {
.name = MACHINE_TYPE_NAME("romulus-bmc"),
.parent = TYPE_MACHINE,
.class_init = romulus_bmc_class_init,
};
static void aspeed_machine_init(void)
{
type_register_static(&palmetto_bmc_type);
type_register_static(&ast2500_evb_type);
type_register_static(&romulus_bmc_type);
}
type_init(aspeed_machine_init)
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