x86: qemu: Move chipset-specific codes from pci.c to qemu.c

Move chipset-specific codes such as PAM init, PCIe ECAM and MP table
from pci.c to qemu.c, to prepare for DM PCI conversion.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>

arch/x86/cpu/qemu/pci.c

@@ -6,14 +6,9 @@
 
 #include <common.h>
 #include <pci.h>
-#include <asm/pci.h>
-#include <asm/arch/device.h>
-#include <asm/arch/qemu.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
-static bool i440fx;
-
 void board_pci_setup_hose(struct pci_controller *hose)
 {
 	hose->first_busno = 0;
@@ -50,72 +45,5 @@ void board_pci_setup_hose(struct pci_controller *hose)
 
 int board_pci_post_scan(struct pci_controller *hose)
 {
-	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.
-	 */
-	device = x86_pci_read_config16(PCI_BDF(0, 0, 0), PCI_DEVICE_ID);
-	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++)
-		x86_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.
-		 */
-		x86_pci_write_config16(PIIX_IDE, IDE0_TIM, IDE_DECODE_EN);
-		x86_pci_write_config16(PIIX_IDE, IDE1_TIM, IDE_DECODE_EN);
-
-		/* Enable I/O APIC */
-		xbcs = x86_pci_read_config16(PIIX_ISA, XBCS);
-		xbcs |= APIC_EN;
-		x86_pci_write_config16(PIIX_ISA, XBCS, xbcs);
-	} else {
-		/* Configure PCIe ECAM base address */
-		x86_pci_write_config32(PCI_BDF(0, 0, 0), PCIEX_BAR,
-				       CONFIG_PCIE_ECAM_BASE | BAR_EN);
-	}
-
 	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.
-		 */
-		irq = x86_pci_read_config8(PCI_BDF(bus, dev, func),
-					   PCI_INTERRUPT_LINE);
-	} 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

arch/x86/cpu/qemu/qemu.c

@@ -6,8 +6,58 @@
 
 #include <common.h>
 #include <asm/irq.h>
+#include <asm/pci.h>
 #include <asm/post.h>
 #include <asm/processor.h>
+#include <asm/arch/device.h>
+#include <asm/arch/qemu.h>
+
+static bool i440fx;
+
+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.
+	 */
+	device = x86_pci_read_config16(PCI_BDF(0, 0, 0), PCI_DEVICE_ID);
+	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++)
+		x86_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.
+		 */
+		x86_pci_write_config16(PIIX_IDE, IDE0_TIM, IDE_DECODE_EN);
+		x86_pci_write_config16(PIIX_IDE, IDE1_TIM, IDE_DECODE_EN);
+
+		/* Enable I/O APIC */
+		xbcs = x86_pci_read_config16(PIIX_ISA, XBCS);
+		xbcs |= APIC_EN;
+		x86_pci_write_config16(PIIX_ISA, XBCS, xbcs);
+	} else {
+		/* Configure PCIe ECAM base address */
+		x86_pci_write_config32(PCI_BDF(0, 0, 0), PCIEX_BAR,
+				       CONFIG_PCIE_ECAM_BASE | BAR_EN);
+	}
+}
 
 int arch_cpu_init(void)
 {
@@ -39,7 +89,39 @@ void reset_cpu(ulong addr)
 	x86_full_reset();
 }
 
+int arch_early_init_r(void)
+{
+	qemu_chipset_init();
+
+	return 0;
+}
+
 int arch_misc_init(void)
 {
 	return pirq_init();
 }
+
+#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.
+		 */
+		irq = x86_pci_read_config8(PCI_BDF(bus, dev, func),
+					   PCI_INTERRUPT_LINE);
+	} 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

include/configs/qemu-x86.h

@@ -15,6 +15,7 @@
 
 #define CONFIG_SYS_MONITOR_LEN		(1 << 20)
 #define CONFIG_ARCH_MISC_INIT
+#define CONFIG_ARCH_EARLY_INIT_R
 
 #define CONFIG_PCI_MEM_BUS		0xc0000000
 #define CONFIG_PCI_MEM_PHYS		CONFIG_PCI_MEM_BUS
@@ -28,6 +29,7 @@
 #define CONFIG_PCI_IO_PHYS		CONFIG_PCI_IO_BUS
 #define CONFIG_PCI_IO_SIZE		0xe000
 
+#define CONFIG_SYS_EARLY_PCI_INIT
 #define CONFIG_PCI_PNP
 
 #define CONFIG_STD_DEVICES_SETTINGS	"stdin=serial,vga\0" \