u-boot/arch/x86/cpu/quark/quark.c
Bin Meng 911d6f6932 x86: quark: Assign a unique I/O APIC ID
After power-on, both LAPIC and I/O APIC appear with the same APIC ID
zero, which creates an ID conflict. When generating MP table, U-Boot
reports zero as the LAPIC ID in the processor entry, and zero as the
I/O APIC ID in the I/O APIC as well as the I/O interrupt assignment
entries. Such MP table confuses Linux kernel and finally a kernel
panic is seen during boot:

  BUG: unable to handle kernel paging request at ffff9000
  IP: [<c101d462>] native_io_apic_write+0x22/0x30
  *pdpt = 00000000014fb001 *pde = 00000000014ff067 *pte = 0000000000000000
  Oops: 0002 [#1]
  Modules linked in:
  Pid: 1, comm: swapper Tainted: G        W    3.8.7 #3 intel galileo/galileo
  EIP: 0060:[<c101d462>] EFLAGS: 00010086 CPU: 0
  EIP is at native_io_apic_write+0x22/0x30
  ...
  Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-05-23 15:27:42 +08:00

366 lines
10 KiB
C

/*
* Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <mmc.h>
#include <asm/io.h>
#include <asm/ioapic.h>
#include <asm/mrccache.h>
#include <asm/mtrr.h>
#include <asm/pci.h>
#include <asm/post.h>
#include <asm/arch/device.h>
#include <asm/arch/msg_port.h>
#include <asm/arch/quark.h>
static struct pci_device_id mmc_supported[] = {
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_QRK_SDIO },
{},
};
static void quark_setup_mtrr(void)
{
u32 base, mask;
int i;
disable_caches();
/* mark the VGA RAM area as uncacheable */
msg_port_write(MSG_PORT_HOST_BRIDGE, MTRR_FIX_16K_A0000,
MTRR_FIX_TYPE(MTRR_TYPE_UNCACHEABLE));
msg_port_write(MSG_PORT_HOST_BRIDGE, MTRR_FIX_16K_B0000,
MTRR_FIX_TYPE(MTRR_TYPE_UNCACHEABLE));
/* mark other fixed range areas as cacheable */
msg_port_write(MSG_PORT_HOST_BRIDGE, MTRR_FIX_64K_00000,
MTRR_FIX_TYPE(MTRR_TYPE_WRBACK));
msg_port_write(MSG_PORT_HOST_BRIDGE, MTRR_FIX_64K_40000,
MTRR_FIX_TYPE(MTRR_TYPE_WRBACK));
msg_port_write(MSG_PORT_HOST_BRIDGE, MTRR_FIX_16K_80000,
MTRR_FIX_TYPE(MTRR_TYPE_WRBACK));
msg_port_write(MSG_PORT_HOST_BRIDGE, MTRR_FIX_16K_90000,
MTRR_FIX_TYPE(MTRR_TYPE_WRBACK));
for (i = MTRR_FIX_4K_C0000; i <= MTRR_FIX_4K_FC000; i++)
msg_port_write(MSG_PORT_HOST_BRIDGE, i,
MTRR_FIX_TYPE(MTRR_TYPE_WRBACK));
/* variable range MTRR#0: ROM area */
mask = ~(CONFIG_SYS_MONITOR_LEN - 1);
base = CONFIG_SYS_TEXT_BASE & mask;
msg_port_write(MSG_PORT_HOST_BRIDGE, MTRR_VAR_PHYBASE(MTRR_VAR_ROM),
base | MTRR_TYPE_WRBACK);
msg_port_write(MSG_PORT_HOST_BRIDGE, MTRR_VAR_PHYMASK(MTRR_VAR_ROM),
mask | MTRR_PHYS_MASK_VALID);
/* variable range MTRR#1: eSRAM area */
mask = ~(ESRAM_SIZE - 1);
base = CONFIG_ESRAM_BASE & mask;
msg_port_write(MSG_PORT_HOST_BRIDGE, MTRR_VAR_PHYBASE(MTRR_VAR_ESRAM),
base | MTRR_TYPE_WRBACK);
msg_port_write(MSG_PORT_HOST_BRIDGE, MTRR_VAR_PHYMASK(MTRR_VAR_ESRAM),
mask | MTRR_PHYS_MASK_VALID);
/* enable both variable and fixed range MTRRs */
msg_port_write(MSG_PORT_HOST_BRIDGE, MTRR_DEF_TYPE,
MTRR_DEF_TYPE_EN | MTRR_DEF_TYPE_FIX_EN);
enable_caches();
}
static void quark_setup_bars(void)
{
/* GPIO - D31:F0:R44h */
qrk_pci_write_config_dword(QUARK_LEGACY_BRIDGE, LB_GBA,
CONFIG_GPIO_BASE | IO_BAR_EN);
/* ACPI PM1 Block - D31:F0:R48h */
qrk_pci_write_config_dword(QUARK_LEGACY_BRIDGE, LB_PM1BLK,
CONFIG_ACPI_PM1_BASE | IO_BAR_EN);
/* GPE0 - D31:F0:R4Ch */
qrk_pci_write_config_dword(QUARK_LEGACY_BRIDGE, LB_GPE0BLK,
CONFIG_ACPI_GPE0_BASE | IO_BAR_EN);
/* WDT - D31:F0:R84h */
qrk_pci_write_config_dword(QUARK_LEGACY_BRIDGE, LB_WDTBA,
CONFIG_WDT_BASE | IO_BAR_EN);
/* RCBA - D31:F0:RF0h */
qrk_pci_write_config_dword(QUARK_LEGACY_BRIDGE, LB_RCBA,
CONFIG_RCBA_BASE | MEM_BAR_EN);
/* ACPI P Block - Msg Port 04:R70h */
msg_port_write(MSG_PORT_RMU, PBLK_BA,
CONFIG_ACPI_PBLK_BASE | IO_BAR_EN);
/* SPI DMA - Msg Port 04:R7Ah */
msg_port_write(MSG_PORT_RMU, SPI_DMA_BA,
CONFIG_SPI_DMA_BASE | IO_BAR_EN);
/* PCIe ECAM */
msg_port_write(MSG_PORT_MEM_ARBITER, AEC_CTRL,
CONFIG_PCIE_ECAM_BASE | MEM_BAR_EN);
msg_port_write(MSG_PORT_HOST_BRIDGE, HEC_REG,
CONFIG_PCIE_ECAM_BASE | MEM_BAR_EN);
}
static void quark_pcie_early_init(void)
{
/*
* Step1: Assert PCIe signal PERST#
*
* The CPU interface to the PERST# signal is platform dependent.
* Call the board-specific codes to perform this task.
*/
board_assert_perst();
/* Step2: PHY common lane reset */
msg_port_alt_setbits(MSG_PORT_SOC_UNIT, PCIE_CFG, PCIE_PHY_LANE_RST);
/* wait 1 ms for PHY common lane reset */
mdelay(1);
/* Step3: PHY sideband interface reset and controller main reset */
msg_port_alt_setbits(MSG_PORT_SOC_UNIT, PCIE_CFG,
PCIE_PHY_SB_RST | PCIE_CTLR_MAIN_RST);
/* wait 80ms for PLL to lock */
mdelay(80);
/* Step4: Controller sideband interface reset */
msg_port_alt_setbits(MSG_PORT_SOC_UNIT, PCIE_CFG, PCIE_CTLR_SB_RST);
/* wait 20ms for controller sideband interface reset */
mdelay(20);
/* Step5: De-assert PERST# */
board_deassert_perst();
/* Step6: Controller primary interface reset */
msg_port_alt_setbits(MSG_PORT_SOC_UNIT, PCIE_CFG, PCIE_CTLR_PRI_RST);
/* Mixer Load Lane 0 */
msg_port_io_clrbits(MSG_PORT_PCIE_AFE, PCIE_RXPICTRL0_L0,
(1 << 6) | (1 << 7));
/* Mixer Load Lane 1 */
msg_port_io_clrbits(MSG_PORT_PCIE_AFE, PCIE_RXPICTRL0_L1,
(1 << 6) | (1 << 7));
}
static void quark_usb_early_init(void)
{
/* The sequence below comes from Quark firmware writer guide */
msg_port_alt_clrsetbits(MSG_PORT_USB_AFE, USB2_GLOBAL_PORT,
1 << 1, (1 << 6) | (1 << 7));
msg_port_alt_clrsetbits(MSG_PORT_USB_AFE, USB2_COMPBG,
(1 << 8) | (1 << 9), (1 << 7) | (1 << 10));
msg_port_alt_setbits(MSG_PORT_USB_AFE, USB2_PLL2, 1 << 29);
msg_port_alt_setbits(MSG_PORT_USB_AFE, USB2_PLL1, 1 << 1);
msg_port_alt_clrsetbits(MSG_PORT_USB_AFE, USB2_PLL1,
(1 << 3) | (1 << 4) | (1 << 5), 1 << 6);
msg_port_alt_clrbits(MSG_PORT_USB_AFE, USB2_PLL2, 1 << 29);
msg_port_alt_setbits(MSG_PORT_USB_AFE, USB2_PLL2, 1 << 24);
}
static void quark_thermal_early_init(void)
{
/* The sequence below comes from Quark firmware writer guide */
/* thermal sensor mode config */
msg_port_alt_clrsetbits(MSG_PORT_SOC_UNIT, TS_CFG1,
(1 << 3) | (1 << 4) | (1 << 5), 1 << 5);
msg_port_alt_clrsetbits(MSG_PORT_SOC_UNIT, TS_CFG1,
(1 << 8) | (1 << 9) | (1 << 10) | (1 << 11) |
(1 << 12), 1 << 9);
msg_port_alt_setbits(MSG_PORT_SOC_UNIT, TS_CFG1, 1 << 14);
msg_port_alt_clrbits(MSG_PORT_SOC_UNIT, TS_CFG1, 1 << 17);
msg_port_alt_clrbits(MSG_PORT_SOC_UNIT, TS_CFG1, 1 << 18);
msg_port_alt_clrsetbits(MSG_PORT_SOC_UNIT, TS_CFG2, 0xffff, 0x011f);
msg_port_alt_clrsetbits(MSG_PORT_SOC_UNIT, TS_CFG3, 0xff, 0x17);
msg_port_alt_clrsetbits(MSG_PORT_SOC_UNIT, TS_CFG3,
(1 << 8) | (1 << 9), 1 << 8);
msg_port_alt_clrbits(MSG_PORT_SOC_UNIT, TS_CFG3, 0xff000000);
msg_port_alt_clrsetbits(MSG_PORT_SOC_UNIT, TS_CFG4,
0x7ff800, 0xc8 << 11);
/* thermal monitor catastrophic trip set point (105 celsius) */
msg_port_clrsetbits(MSG_PORT_RMU, TS_TRIP, 0xff, 155);
/* thermal monitor catastrophic trip clear point (0 celsius) */
msg_port_clrsetbits(MSG_PORT_RMU, TS_TRIP, 0xff0000, 50 << 16);
/* take thermal sensor out of reset */
msg_port_alt_clrbits(MSG_PORT_SOC_UNIT, TS_CFG4, 1 << 0);
/* enable thermal monitor */
msg_port_setbits(MSG_PORT_RMU, TS_MODE, 1 << 15);
/* lock all thermal configuration */
msg_port_setbits(MSG_PORT_RMU, RMU_CTRL, (1 << 5) | (1 << 6));
}
static void quark_enable_legacy_seg(void)
{
msg_port_setbits(MSG_PORT_HOST_BRIDGE, HMISC2,
HMISC2_SEGE | HMISC2_SEGF | HMISC2_SEGAB);
}
int arch_cpu_init(void)
{
int ret;
post_code(POST_CPU_INIT);
ret = x86_cpu_init_f();
if (ret)
return ret;
/*
* Quark SoC does not support MSR MTRRs. Fixed and variable range MTRRs
* are accessed indirectly via the message port and not the traditional
* MSR mechanism. Only UC, WT and WB cache types are supported.
*/
quark_setup_mtrr();
/*
* Quark SoC has some non-standard BARs (excluding PCI standard BARs)
* which need be initialized with suggested values
*/
quark_setup_bars();
/* Initialize USB2 PHY */
quark_usb_early_init();
/* Initialize thermal sensor */
quark_thermal_early_init();
/* Turn on legacy segments (A/B/E/F) decode to system RAM */
quark_enable_legacy_seg();
return 0;
}
int arch_cpu_init_dm(void)
{
/*
* Initialize PCIe controller
*
* Quark SoC holds the PCIe controller in reset following a power on.
* U-Boot needs to release the PCIe controller from reset. The PCIe
* controller (D23:F0/F1) will not be visible in PCI configuration
* space and any access to its PCI configuration registers will cause
* system hang while it is held in reset.
*/
quark_pcie_early_init();
return 0;
}
int print_cpuinfo(void)
{
post_code(POST_CPU_INFO);
return default_print_cpuinfo();
}
void reset_cpu(ulong addr)
{
/* cold reset */
x86_full_reset();
}
static void quark_pcie_init(void)
{
u32 val;
/* PCIe upstream non-posted & posted request size */
qrk_pci_write_config_dword(QUARK_PCIE0, PCIE_RP_CCFG,
CCFG_UPRS | CCFG_UNRS);
qrk_pci_write_config_dword(QUARK_PCIE1, PCIE_RP_CCFG,
CCFG_UPRS | CCFG_UNRS);
/* PCIe packet fast transmit mode (IPF) */
qrk_pci_write_config_dword(QUARK_PCIE0, PCIE_RP_MPC2, MPC2_IPF);
qrk_pci_write_config_dword(QUARK_PCIE1, PCIE_RP_MPC2, MPC2_IPF);
/* PCIe message bus idle counter (SBIC) */
qrk_pci_read_config_dword(QUARK_PCIE0, PCIE_RP_MBC, &val);
val |= MBC_SBIC;
qrk_pci_write_config_dword(QUARK_PCIE0, PCIE_RP_MBC, val);
qrk_pci_read_config_dword(QUARK_PCIE1, PCIE_RP_MBC, &val);
val |= MBC_SBIC;
qrk_pci_write_config_dword(QUARK_PCIE1, PCIE_RP_MBC, val);
}
static void quark_usb_init(void)
{
u32 bar;
/* Change USB EHCI packet buffer OUT/IN threshold */
qrk_pci_read_config_dword(QUARK_USB_EHCI, PCI_BASE_ADDRESS_0, &bar);
writel((0x7f << 16) | 0x7f, bar + EHCI_INSNREG01);
/* Disable USB device interrupts */
qrk_pci_read_config_dword(QUARK_USB_DEVICE, PCI_BASE_ADDRESS_0, &bar);
writel(0x7f, bar + USBD_INT_MASK);
writel((0xf << 16) | 0xf, bar + USBD_EP_INT_MASK);
writel((0xf << 16) | 0xf, bar + USBD_EP_INT_STS);
}
int arch_early_init_r(void)
{
quark_pcie_init();
quark_usb_init();
return 0;
}
int cpu_mmc_init(bd_t *bis)
{
return pci_mmc_init("Quark SDHCI", mmc_supported);
}
int arch_misc_init(void)
{
#ifdef CONFIG_ENABLE_MRC_CACHE
/*
* We intend not to check any return value here, as even MRC cache
* is not saved successfully, it is not a severe error that will
* prevent system from continuing to boot.
*/
mrccache_save();
#endif
/* Assign a unique I/O APIC ID */
io_apic_set_id(1);
return 0;
}
void board_final_cleanup(void)
{
struct quark_rcba *rcba;
u32 base, val;
qrk_pci_read_config_dword(QUARK_LEGACY_BRIDGE, LB_RCBA, &base);
base &= ~MEM_BAR_EN;
rcba = (struct quark_rcba *)base;
/* Initialize 'Component ID' to zero */
val = readl(&rcba->esd);
val &= ~0xff0000;
writel(val, &rcba->esd);
/* Lock HMBOUND for security */
msg_port_setbits(MSG_PORT_HOST_BRIDGE, HM_BOUND, HM_BOUND_LOCK);
return;
}