board: Add Qemu SH4 r2d configuration

[ Thomas:

   * renamed sh4_defconfig to qemu_sh4_r2d_defconfig, for consistency
     with other Qemu platforms supported
   * renamed board/qemu/sh4 to board/qemu/sh4-r2d
   * minor fixes in the readme.txt
   * remove useless statements in the minimal defconfig
   * switch to a fixed kernel version instead of "same as headers"
]

Signed-off-by: Philippe Reynes <tremyfr@yahoo.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

board/qemu/sh4-r2d/kernel-patches/linux-06-17-SH-Add-missing-consts-to-sys_execve-declaration.patch

@@ -0,0 +1,17 @@
+diff --git a/arch/sh/include/asm/syscalls_32.h b/arch/sh/include/asm/syscalls_32.h
+index be201fd..454538a 100644
+--- a/arch/sh/include/asm/syscalls_32.h
++++ b/arch/sh/include/asm/syscalls_32.h
+@@ -19,8 +19,10 @@ asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
+ asmlinkage int sys_vfork(unsigned long r4, unsigned long r5,
+ 			 unsigned long r6, unsigned long r7,
+ 			 struct pt_regs __regs);
+-asmlinkage int sys_execve(const char __user *ufilename, char __user * __user *uargv,
+-			  char __user * __user *uenvp, unsigned long r7,
++asmlinkage int sys_execve(const char __user *ufilename,
++			  const char __user *const __user *uargv,
++			  const char __user *const __user *uenvp,
++			  unsigned long r7,
+ 			  struct pt_regs __regs);
+ asmlinkage int sys_sigsuspend(old_sigset_t mask, unsigned long r5,
+ 			      unsigned long r6, unsigned long r7,

board/qemu/sh4-r2d/kernel-patches/linux-sh-fix-kconfig-warning.patch

@@ -0,0 +1,13 @@
+diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
+index 33990fa..06645b6 100644
+--- a/arch/sh/Kconfig
++++ b/arch/sh/Kconfig
+@@ -45,7 +45,7 @@ config SUPERH32
+ 	select HAVE_ARCH_KGDB
+ 	select HAVE_HW_BREAKPOINT
+ 	select HAVE_MIXED_BREAKPOINTS_REGS
+-	select PERF_EVENTS if HAVE_HW_BREAKPOINT
++	select PERF_EVENTS
+ 	select ARCH_HIBERNATION_POSSIBLE if MMU
+ 
+ config SUPERH64

board/qemu/sh4-r2d/linux-2.6.36.config

@@ -0,0 +1,106 @@
+CONFIG_EXPERIMENTAL=y
+CONFIG_SYSVIPC=y
+CONFIG_IKCONFIG=y
+CONFIG_IKCONFIG_PROC=y
+CONFIG_LOG_BUF_SHIFT=14
+CONFIG_SYSFS_DEPRECATED_V2=y
+# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
+# CONFIG_SYSCTL_SYSCALL is not set
+CONFIG_SLAB=y
+CONFIG_PROFILING=y
+CONFIG_OPROFILE=y
+CONFIG_MODULES=y
+# CONFIG_BLK_DEV_BSG is not set
+CONFIG_CPU_SUBTYPE_SH7751R=y
+CONFIG_MEMORY_START=0x0c000000
+CONFIG_FLATMEM_MANUAL=y
+CONFIG_SH_RTS7751R2D=y
+CONFIG_RTS7751R2D_PLUS=y
+CONFIG_HEARTBEAT=y
+CONFIG_PCI=y
+CONFIG_HOTPLUG_PCI=y
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+# CONFIG_INET_LRO is not set
+# CONFIG_IPV6 is not set
+CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
+CONFIG_FW_LOADER=m
+CONFIG_BLK_DEV_RAM=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_ATA=y
+CONFIG_PATA_PLATFORM=y
+CONFIG_NETDEVICES=y
+CONFIG_NET_ETHERNET=y
+CONFIG_NET_PCI=y
+CONFIG_8139CP=y
+CONFIG_8139TOO=y
+# CONFIG_8139TOO_PIO is not set
+# CONFIG_WLAN is not set
+CONFIG_INPUT_FF_MEMLESS=m
+# CONFIG_INPUT_MOUSEDEV is not set
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
+# CONFIG_SERIO is not set
+CONFIG_VT_HW_CONSOLE_BINDING=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_SH_SCI=y
+CONFIG_SERIAL_SH_SCI_NR_UARTS=1
+CONFIG_SERIAL_SH_SCI_CONSOLE=y
+CONFIG_HW_RANDOM=y
+CONFIG_SPI=y
+CONFIG_SPI_SH_SCI=y
+CONFIG_MFD_SM501=y
+CONFIG_VIDEO_OUTPUT_CONTROL=m
+CONFIG_FB=y
+CONFIG_FB_SH_MOBILE_LCDC=m
+CONFIG_FB_SH_MOBILE_HDMI=m
+CONFIG_FB_SM501=y
+CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_LOGO=y
+# CONFIG_LOGO_LINUX_MONO is not set
+# CONFIG_LOGO_LINUX_VGA16 is not set
+# CONFIG_LOGO_LINUX_CLUT224 is not set
+# CONFIG_LOGO_SUPERH_MONO is not set
+# CONFIG_LOGO_SUPERH_VGA16 is not set
+CONFIG_SOUND=y
+CONFIG_SND=m
+CONFIG_SND_YMFPCI=m
+CONFIG_SOUND_PRIME=m
+CONFIG_HID_A4TECH=y
+CONFIG_HID_APPLE=y
+CONFIG_HID_BELKIN=y
+CONFIG_HID_CHERRY=y
+CONFIG_HID_CHICONY=y
+CONFIG_HID_CYPRESS=y
+CONFIG_HID_EZKEY=y
+CONFIG_HID_GYRATION=y
+CONFIG_HID_LOGITECH=y
+CONFIG_HID_MICROSOFT=y
+CONFIG_HID_MONTEREY=y
+CONFIG_HID_PANTHERLORD=y
+CONFIG_HID_PETALYNX=y
+CONFIG_HID_SAMSUNG=y
+CONFIG_HID_SONY=y
+CONFIG_HID_SUNPLUS=y
+CONFIG_USB=y
+CONFIG_USB_ANNOUNCE_NEW_DEVICES=y
+CONFIG_USB_OHCI_HCD=y
+CONFIG_USB_STORAGE=y
+CONFIG_USB_LIBUSUAL=y
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_DRV_R9701=y
+CONFIG_EXT2_FS=y
+CONFIG_MSDOS_FS=y
+CONFIG_VFAT_FS=y
+CONFIG_PROC_KCORE=y
+CONFIG_TMPFS=y
+CONFIG_MINIX_FS=y
+CONFIG_NLS_CODEPAGE_932=y
+CONFIG_DEBUG_FS=y
+# CONFIG_RCU_CPU_STALL_DETECTOR is not set
+# CONFIG_CRYPTO_ANSI_CPRNG is not set
+CONFIG_CRC_T10DIF=y

board/qemu/sh4-r2d/readme.txt

@@ -0,0 +1,17 @@
+This little documentation explains how to build a kernel and a rootfs
+for qemu with sh4 architecture.
+
+1) Select qemu sh4 configuration and compile it :
+
+make sh4_defconfig
+make all
+
+2) Run qemu-system-sh4 with the kernel and rootfs previously generated
+
+It's recommended to use a git release for qemu (the current stable
+version has framebuffer display issues). If you want to avoid building
+all target, you can use this option on qemu configure :
+--target-list=sh4-softmmu
+
+The command is :
+qemu-system-sh4 -M r2d -kernel output/images/zImage -drive file=output/images/rootfs.ext2,if=ide,format=raw -append root=/dev/sda console=ttySC1,115200 noiotrap

configs/qemu_sh4_r2d_defconfig

@@ -0,0 +1,17 @@
+# Architecture
+BR2_sh=y
+BR2_sh4=y
+
+# The kernel wants to use the -m4-nofpu option to make sure that it
+# doesn't use floating point operations.
+BR2_GCC_VERSION_4_5_X=y
+BR2_EXTRA_GCC_CONFIG_OPTIONS="--with-multilib-list=m4,m4-nofpu"
+
+# Linux kernel
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="2.6.36"
+BR2_LINUX_KERNEL_PATCH="board/qemu/sh4-r2d/kernel-patches/"
+BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
+BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/sh4-r2d/linux-2.6.36.config"
+BR2_LINUX_KERNEL_ZIMAGE=y