Enable ACPI IO space for piix4 (for pc board) and ich9 (for q35 board)
Signed-off-by: Miao Yan yanmiaobest@gmail.com --- Changes in v2: - add ACPI_PM1_BASE in Kconfig - drop PCI device ID checks
arch/x86/cpu/qemu/Kconfig | 7 +++++++ arch/x86/cpu/qemu/qemu.c | 29 +++++++++++++++++++++++++++++ arch/x86/include/asm/arch-qemu/device.h | 2 ++ arch/x86/include/asm/arch-qemu/qemu.h | 5 +++++ 4 files changed, 43 insertions(+)
diff --git a/arch/x86/cpu/qemu/Kconfig b/arch/x86/cpu/qemu/Kconfig index 4f98621..6808c9a 100644 --- a/arch/x86/cpu/qemu/Kconfig +++ b/arch/x86/cpu/qemu/Kconfig @@ -17,4 +17,11 @@ config SYS_CAR_SIZE hex default 0x10000
+config ACPI_PM1_BASE + hex + default 0xe400 + help + ACPI Power Managment 1 (PM1) i/o-mapped base address. + This device is defined in ACPI specification, with 16 bytes in size. + endif diff --git a/arch/x86/cpu/qemu/qemu.c b/arch/x86/cpu/qemu/qemu.c index 46111c9..b794cfe 100644 --- a/arch/x86/cpu/qemu/qemu.c +++ b/arch/x86/cpu/qemu/qemu.c @@ -15,6 +15,31 @@
static bool i440fx;
+static void enable_pm_piix(void) +{ + u8 en; + u16 cmd; + + /* Set the PM I/O base */ + x86_pci_write_config32(PIIX_PM, PMBA, CONFIG_ACPI_PM1_BASE | 1); + + /* Enable access to the PM I/O space */ + cmd = x86_pci_read_config16(PIIX_PM, PCI_COMMAND); + cmd |= PCI_COMMAND_IO; + x86_pci_write_config16(PIIX_PM, PCI_COMMAND, cmd); + + /* PM I/O Space Enable (PMIOSE) */ + en = x86_pci_read_config8(PIIX_PM, PMREGMISC); + en |= PMIOSE; + x86_pci_write_config8(PIIX_PM, PMREGMISC, en); +} + +static void enable_pm_ich9(void) +{ + /* Set the PM I/O base */ + x86_pci_write_config32(ICH9_PM, PMBA, CONFIG_ACPI_PM1_BASE | 1); +} + static void qemu_chipset_init(void) { u16 device, xbcs; @@ -53,10 +78,14 @@ static void qemu_chipset_init(void) xbcs = x86_pci_read_config16(PIIX_ISA, XBCS); xbcs |= APIC_EN; x86_pci_write_config16(PIIX_ISA, XBCS, xbcs); + + enable_pm_piix(); } else { /* Configure PCIe ECAM base address */ x86_pci_write_config32(PCI_BDF(0, 0, 0), PCIEX_BAR, CONFIG_PCIE_ECAM_BASE | BAR_EN); + + enable_pm_ich9(); }
qemu_fwcfg_init(); diff --git a/arch/x86/include/asm/arch-qemu/device.h b/arch/x86/include/asm/arch-qemu/device.h index 75a435e..38ab798 100644 --- a/arch/x86/include/asm/arch-qemu/device.h +++ b/arch/x86/include/asm/arch-qemu/device.h @@ -13,6 +13,8 @@ #define PIIX_ISA PCI_BDF(0, 1, 0) #define PIIX_IDE PCI_BDF(0, 1, 1) #define PIIX_USB PCI_BDF(0, 1, 2) +#define PIIX_PM PCI_BDF(0, 1, 3) +#define ICH9_PM PCI_BDF(0, 0x1f, 0) #define I440FX_VGA PCI_BDF(0, 2, 0)
#define QEMU_Q35 PCI_BDF(0, 0, 0) diff --git a/arch/x86/include/asm/arch-qemu/qemu.h b/arch/x86/include/asm/arch-qemu/qemu.h index b67d342..a85eee8 100644 --- a/arch/x86/include/asm/arch-qemu/qemu.h +++ b/arch/x86/include/asm/arch-qemu/qemu.h @@ -33,4 +33,9 @@ #define LOW_RAM_ADDR 0x34 #define HIGH_RAM_ADDR 0x35
+/* PM registers */ +#define PMBA 0x40 +#define PMREGMISC 0x80 +#define PMIOSE (1 << 0) + #endif /* _ARCH_QEMU_H_ */