u-boot/arch/x86/cpu/qemu/qemu.c
Simon Glass 76d1d02fd2 board_f: x86: Use checkcpu() for CPU init
At present we misuse print_cpuinfo() do so CPU init on x86. This is done
because it is the next available call after the console is enabled. But
several arches use checkcpu() instead. Despite the horrible name (which
we can fix), it seems a better choice.

Adjust the various x86 CPU implementations to move their init code into
checkcpu() and use print_cpuinfo() only for printing CPU info.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Stefan Roese <sr@denx.de>
2017-04-05 13:55:09 -04:00

200 lines
4.5 KiB
C

/*
* Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <pci.h>
#include <qfw.h>
#include <asm/irq.h>
#include <asm/post.h>
#include <asm/processor.h>
#include <asm/arch/device.h>
#include <asm/arch/qemu.h>
static bool i440fx;
#ifdef CONFIG_QFW
/* on x86, the qfw registers are all IO ports */
#define FW_CONTROL_PORT 0x510
#define FW_DATA_PORT 0x511
#define FW_DMA_PORT_LOW 0x514
#define FW_DMA_PORT_HIGH 0x518
static void qemu_x86_fwcfg_read_entry_pio(uint16_t entry,
uint32_t size, void *address)
{
uint32_t i = 0;
uint8_t *data = address;
/*
* writting FW_CFG_INVALID will cause read operation to resume at
* last offset, otherwise read will start at offset 0
*
* Note: on platform where the control register is IO port, the
* endianness is little endian.
*/
if (entry != FW_CFG_INVALID)
outw(cpu_to_le16(entry), FW_CONTROL_PORT);
/* the endianness of data register is string-preserving */
while (size--)
data[i++] = inb(FW_DATA_PORT);
}
static void qemu_x86_fwcfg_read_entry_dma(struct fw_cfg_dma_access *dma)
{
/* the DMA address register is big endian */
outl(cpu_to_be32((uintptr_t)dma), FW_DMA_PORT_HIGH);
while (be32_to_cpu(dma->control) & ~FW_CFG_DMA_ERROR)
__asm__ __volatile__ ("pause");
}
static struct fw_cfg_arch_ops fwcfg_x86_ops = {
.arch_read_pio = qemu_x86_fwcfg_read_entry_pio,
.arch_read_dma = qemu_x86_fwcfg_read_entry_dma
};
#endif
static void enable_pm_piix(void)
{
u8 en;
u16 cmd;
/* Set the PM I/O base */
pci_write_config32(PIIX_PM, PMBA, CONFIG_ACPI_PM1_BASE | 1);
/* Enable access to the PM I/O space */
pci_read_config16(PIIX_PM, PCI_COMMAND, &cmd);
cmd |= PCI_COMMAND_IO;
pci_write_config16(PIIX_PM, PCI_COMMAND, cmd);
/* PM I/O Space Enable (PMIOSE) */
pci_read_config8(PIIX_PM, PMREGMISC, &en);
en |= PMIOSE;
pci_write_config8(PIIX_PM, PMREGMISC, en);
}
static void enable_pm_ich9(void)
{
/* Set the PM I/O base */
pci_write_config32(ICH9_PM, PMBA, CONFIG_ACPI_PM1_BASE | 1);
}
static void qemu_chipset_init(void)
{
u16 device, xbcs;
int pam, i;
/*
* i440FX and Q35 chipset have different PAM register offset, but with
* the same bitfield layout. Here we determine the offset based on its
* PCI device ID.
*/
pci_read_config16(PCI_BDF(0, 0, 0), PCI_DEVICE_ID, &device);
i440fx = (device == PCI_DEVICE_ID_INTEL_82441);
pam = i440fx ? I440FX_PAM : Q35_PAM;
/*
* Initialize Programmable Attribute Map (PAM) Registers
*
* Configure legacy segments C/D/E/F to system RAM
*/
for (i = 0; i < PAM_NUM; i++)
pci_write_config8(PCI_BDF(0, 0, 0), pam + i, PAM_RW);
if (i440fx) {
/*
* Enable legacy IDE I/O ports decode
*
* Note: QEMU always decode legacy IDE I/O port on PIIX chipset.
* However Linux ata_piix driver does sanity check on these two
* registers to see whether legacy ports decode is turned on.
* This is to make Linux ata_piix driver happy.
*/
pci_write_config16(PIIX_IDE, IDE0_TIM, IDE_DECODE_EN);
pci_write_config16(PIIX_IDE, IDE1_TIM, IDE_DECODE_EN);
/* Enable I/O APIC */
pci_read_config16(PIIX_ISA, XBCS, &xbcs);
xbcs |= APIC_EN;
pci_write_config16(PIIX_ISA, XBCS, xbcs);
enable_pm_piix();
} else {
/* Configure PCIe ECAM base address */
pci_write_config32(PCI_BDF(0, 0, 0), PCIEX_BAR,
CONFIG_PCIE_ECAM_BASE | BAR_EN);
enable_pm_ich9();
}
#ifdef CONFIG_QFW
qemu_fwcfg_init(&fwcfg_x86_ops);
#endif
}
#if !CONFIG_IS_ENABLED(SPL_X86_32BIT_INIT)
int arch_cpu_init(void)
{
post_code(POST_CPU_INIT);
return x86_cpu_init_f();
}
#endif
#if !CONFIG_IS_ENABLED(EFI_STUB) && \
!CONFIG_IS_ENABLED(SPL_X86_32BIT_INIT)
int checkcpu(void)
{
return 0;
}
int print_cpuinfo(void)
{
post_code(POST_CPU_INFO);
return default_print_cpuinfo();
}
#endif
void reset_cpu(ulong addr)
{
/* cold reset */
x86_full_reset();
}
int arch_early_init_r(void)
{
qemu_chipset_init();
return 0;
}
#ifdef CONFIG_GENERATE_MP_TABLE
int mp_determine_pci_dstirq(int bus, int dev, int func, int pirq)
{
u8 irq;
if (i440fx) {
/*
* Not like most x86 platforms, the PIRQ[A-D] on PIIX3 are not
* connected to I/O APIC INTPIN#16-19. Instead they are routed
* to an irq number controled by the PIRQ routing register.
*/
pci_read_config8(PCI_BDF(bus, dev, func),
PCI_INTERRUPT_LINE, &irq);
} else {
/*
* ICH9's PIRQ[A-H] are not consecutive numbers from 0 to 7.
* PIRQ[A-D] still maps to [0-3] but PIRQ[E-H] maps to [8-11].
*/
irq = pirq < 8 ? pirq + 16 : pirq + 12;
}
return irq;
}
#endif