ARM: qemu-arm: Add support for AArch64

This adds support for '-machine virt' on AArch64. This is rather simple:
we just add TARGET_QEMU_ARM_xxBIT to select a few different Kconfig
symbols, provide the ARMv8 memory map from the board file and add a new
defconfig based on the 32-bit defconfig.

Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
Reviewed-by: Tom Rini <trini@konsulko.com>

arch/arm/Kconfig

@@ -675,8 +675,6 @@ config ARCH_MX5
 
 config ARCH_QEMU
 	bool "QEMU Virtual Platform"
-	select CPU_V7
-	select ARCH_SUPPORT_PSCI
 	select DM
 	select DM_SERIAL
 	select OF_CONTROL

arch/arm/mach-qemu/Kconfig

@@ -10,3 +10,14 @@ config SYS_CONFIG_NAME
 	default "qemu-arm"
 
 endif
+
+config TARGET_QEMU_ARM_32BIT
+	bool "Support qemu_arm"
+	depends on ARCH_QEMU
+	select CPU_V7
+	select ARCH_SUPPORT_PSCI
+
+config TARGET_QEMU_ARM_64BIT
+	bool "Support qemu_arm64"
+	depends on ARCH_QEMU
+	select ARM64

board/emulation/qemu-arm/MAINTAINERS

@@ -4,3 +4,4 @@ S:	Maintained
 F:	board/emulation/qemu-arm/
 F:	include/configs/qemu-arm.h
 F:	configs/qemu_arm_defconfig
+F:	configs/qemu_arm64_defconfig

board/emulation/qemu-arm/qemu-arm.c

@@ -6,6 +6,41 @@
 #include <common.h>
 #include <fdtdec.h>
 
+#ifdef CONFIG_ARM64
+#include <asm/armv8/mmu.h>
+
+static struct mm_region qemu_arm64_mem_map[] = {
+	{
+		/* Flash */
+		.virt = 0x00000000UL,
+		.phys = 0x00000000UL,
+		.size = 0x08000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+			 PTE_BLOCK_INNER_SHARE
+	}, {
+		/* Peripherals */
+		.virt = 0x08000000UL,
+		.phys = 0x08000000UL,
+		.size = 0x38000000,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+			 PTE_BLOCK_NON_SHARE |
+			 PTE_BLOCK_PXN | PTE_BLOCK_UXN
+	}, {
+		/* RAM */
+		.virt = 0x40000000UL,
+		.phys = 0x40000000UL,
+		.size = 0xc0000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+			 PTE_BLOCK_INNER_SHARE
+	}, {
+		/* List terminator */
+		0,
+	}
+};
+
+struct mm_region *mem_map = qemu_arm64_mem_map;
+#endif
+
 int board_init(void)
 {
 	return 0;

configs/qemu_arm64_defconfig

+CONFIG_ARM=y
+CONFIG_ARM_SMCCC=y
+CONFIG_ARCH_QEMU=y
+CONFIG_TARGET_QEMU_ARM_64BIT=y
+CONFIG_AHCI=y
+CONFIG_DISTRO_DEFAULTS=y
+# CONFIG_DISPLAY_CPUINFO is not set
+# CONFIG_DISPLAY_BOARDINFO is not set
+CONFIG_CMD_PCI=y
+CONFIG_CMD_USB=y
+CONFIG_OF_BOARD=y
+CONFIG_SCSI_AHCI=y
+CONFIG_AHCI_PCI=y
+CONFIG_BLK=y
+# CONFIG_MMC is not set
+CONFIG_DM_ETH=y
+CONFIG_E1000=y
+CONFIG_NVME=y
+CONFIG_PCI=y
+CONFIG_DM_PCI=y
+CONFIG_PCIE_ECAM_GENERIC=y
+CONFIG_SCSI=y
+CONFIG_DM_SCSI=y
+CONFIG_SYSRESET=y
+CONFIG_SYSRESET_PSCI=y
+CONFIG_USB=y
+CONFIG_DM_USB=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_EHCI_PCI=y

configs/qemu_arm_defconfig

 CONFIG_ARM=y
 CONFIG_ARM_SMCCC=y
 CONFIG_ARCH_QEMU=y
+CONFIG_TARGET_QEMU_ARM_32BIT=y
 CONFIG_AHCI=y
 CONFIG_DISTRO_DEFAULTS=y
 # CONFIG_DISPLAY_CPUINFO is not set