Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit bce86083 authored by Steven J. Hill's avatar Steven J. Hill Committed by Ralf Baechle
Browse files

MIPS: microMIPS: Add configuration option for microMIPS kernel. 



This adds the option to build the Linux kernel using only the
microMIPS ISA. The resulting kernel binary is, at a minimum,
20% smaller than using the MIPS32R2 ISA.

Signed-off-by: default avatarSteven J. Hill <Steven.Hill@imgtec.com>
parent 1658f914

arch/mips/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -2041,6 +2041,13 @@ config CPU_HAS_SMARTMIPS 
	  you don't know you probably don't have SmartMIPS and should say N

	  here.



config CPU_MICROMIPS

	depends on SYS_SUPPORTS_MICROMIPS

	bool "Build kernel using microMIPS ISA"

	help

	  When this option is enabled the kernel will be built using the

	  microMIPS ISA



config CPU_HAS_WB

	bool

arch/mips/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -114,6 +114,7 @@ cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(shell $(CC) -dumpmachine |grep -q 'mips.*e 
cflags-$(CONFIG_CPU_LITTLE_ENDIAN)	+= $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(undef-all) $(predef-le))



cflags-$(CONFIG_CPU_HAS_SMARTMIPS)	+= $(call cc-option,-msmartmips)

cflags-$(CONFIG_CPU_MICROMIPS) += $(call cc-option,-mmicromips -mno-jals)



cflags-$(CONFIG_SB1XXX_CORELIS)	+= $(call cc-option,-mno-sched-prolog) \

				   -fno-omit-frame-pointer

arch/mips/configs/sead3_defconfig

+0 −3
Original line number Diff line number Diff line
@@ -2,7 +2,6 @@ CONFIG_MIPS_SEAD3=y 
CONFIG_CPU_LITTLE_ENDIAN=y

CONFIG_CPU_MIPS32_R2=y

CONFIG_HZ_100=y

CONFIG_EXPERIMENTAL=y

CONFIG_SYSVIPC=y

CONFIG_POSIX_MQUEUE=y

CONFIG_NO_HZ=y
@@ -115,10 +114,8 @@ CONFIG_NLS_ISO8859_1=y 
CONFIG_NLS_ISO8859_15=y

CONFIG_NLS_UTF8=y

# CONFIG_FTRACE is not set

CONFIG_CRYPTO=y

CONFIG_CRYPTO_CBC=y

CONFIG_CRYPTO_ECB=y

CONFIG_CRYPTO_AES=y

CONFIG_CRYPTO_ARC4=y

# CONFIG_CRYPTO_ANSI_CPRNG is not set

# CONFIG_CRYPTO_HW is not set

arch/mips/configs/sead3micro_defconfig

0 → 100644
+122 −0
Original line number Diff line number Diff line 
CONFIG_MIPS_SEAD3=y

CONFIG_CPU_LITTLE_ENDIAN=y

CONFIG_CPU_MIPS32_R2=y

CONFIG_CPU_MICROMIPS=y

CONFIG_HZ_100=y

CONFIG_SYSVIPC=y

CONFIG_POSIX_MQUEUE=y

CONFIG_NO_HZ=y

CONFIG_HIGH_RES_TIMERS=y

CONFIG_IKCONFIG=y

CONFIG_IKCONFIG_PROC=y

CONFIG_LOG_BUF_SHIFT=15

CONFIG_EMBEDDED=y

CONFIG_SLAB=y

CONFIG_PROFILING=y

CONFIG_OPROFILE=y

CONFIG_MODULES=y

# CONFIG_BLK_DEV_BSG is not set

# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set

CONFIG_NET=y

CONFIG_PACKET=y

CONFIG_UNIX=y

CONFIG_INET=y

CONFIG_IP_PNP=y

CONFIG_IP_PNP_DHCP=y

CONFIG_IP_PNP_BOOTP=y

# CONFIG_INET_XFRM_MODE_TRANSPORT is not set

# CONFIG_INET_XFRM_MODE_TUNNEL is not set

# CONFIG_INET_XFRM_MODE_BEET is not set

# CONFIG_INET_LRO is not set

# CONFIG_INET_DIAG is not set

# CONFIG_IPV6 is not set

# CONFIG_WIRELESS is not set

CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"

CONFIG_MTD=y

CONFIG_MTD_CHAR=y

CONFIG_MTD_BLOCK=y

CONFIG_MTD_CFI=y

CONFIG_MTD_CFI_INTELEXT=y

CONFIG_MTD_PHYSMAP=y

CONFIG_MTD_UBI=y

CONFIG_MTD_UBI_GLUEBI=y

CONFIG_BLK_DEV_LOOP=y

CONFIG_BLK_DEV_CRYPTOLOOP=m

CONFIG_SCSI=y

# CONFIG_SCSI_PROC_FS is not set

CONFIG_BLK_DEV_SD=y

CONFIG_CHR_DEV_SG=y

# CONFIG_SCSI_LOWLEVEL is not set

CONFIG_NETDEVICES=y

CONFIG_SMSC911X=y

# CONFIG_NET_VENDOR_WIZNET is not set

CONFIG_MARVELL_PHY=y

CONFIG_DAVICOM_PHY=y

CONFIG_QSEMI_PHY=y

CONFIG_LXT_PHY=y

CONFIG_CICADA_PHY=y

CONFIG_VITESSE_PHY=y

CONFIG_SMSC_PHY=y

CONFIG_BROADCOM_PHY=y

CONFIG_ICPLUS_PHY=y

# CONFIG_WLAN is not set

# CONFIG_INPUT_MOUSEDEV is not set

# CONFIG_INPUT_KEYBOARD is not set

# CONFIG_INPUT_MOUSE is not set

# CONFIG_SERIO is not set

# CONFIG_CONSOLE_TRANSLATIONS is not set

CONFIG_VT_HW_CONSOLE_BINDING=y

CONFIG_LEGACY_PTY_COUNT=32

CONFIG_SERIAL_8250=y

CONFIG_SERIAL_8250_CONSOLE=y

CONFIG_SERIAL_8250_NR_UARTS=2

CONFIG_SERIAL_8250_RUNTIME_UARTS=2

# CONFIG_HW_RANDOM is not set

CONFIG_I2C=y

# CONFIG_I2C_COMPAT is not set

CONFIG_I2C_CHARDEV=y

# CONFIG_I2C_HELPER_AUTO is not set

CONFIG_SPI=y

CONFIG_SENSORS_ADT7475=y

CONFIG_BACKLIGHT_LCD_SUPPORT=y

CONFIG_LCD_CLASS_DEVICE=y

CONFIG_BACKLIGHT_CLASS_DEVICE=y

# CONFIG_VGA_CONSOLE is not set

CONFIG_USB=y

CONFIG_USB_ANNOUNCE_NEW_DEVICES=y

CONFIG_USB_EHCI_HCD=y

CONFIG_USB_EHCI_ROOT_HUB_TT=y

CONFIG_USB_STORAGE=y

CONFIG_MMC=y

CONFIG_MMC_DEBUG=y

CONFIG_MMC_SPI=y

CONFIG_NEW_LEDS=y

CONFIG_LEDS_CLASS=y

CONFIG_LEDS_TRIGGERS=y

CONFIG_LEDS_TRIGGER_HEARTBEAT=y

CONFIG_RTC_CLASS=y

CONFIG_RTC_DRV_M41T80=y

CONFIG_EXT3_FS=y

# CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set

CONFIG_XFS_FS=y

CONFIG_XFS_QUOTA=y

CONFIG_XFS_POSIX_ACL=y

CONFIG_QUOTA=y

# CONFIG_PRINT_QUOTA_WARNING is not set

CONFIG_MSDOS_FS=m

CONFIG_VFAT_FS=m

CONFIG_TMPFS=y

CONFIG_JFFS2_FS=y

CONFIG_NFS_FS=y

CONFIG_ROOT_NFS=y

CONFIG_NLS_CODEPAGE_437=y

CONFIG_NLS_ASCII=y

CONFIG_NLS_ISO8859_1=y

CONFIG_NLS_ISO8859_15=y

CONFIG_NLS_UTF8=y

# CONFIG_FTRACE is not set

CONFIG_CRYPTO_CBC=y

CONFIG_CRYPTO_ECB=y

CONFIG_CRYPTO_ARC4=y

# CONFIG_CRYPTO_ANSI_CPRNG is not set

# CONFIG_CRYPTO_HW is not set

arch/mips/kernel/proc.c

+4 −0
Original line number Diff line number Diff line
@@ -99,6 +99,10 @@ static int show_cpuinfo(struct seq_file *m, void *v) 
	if (cpu_has_vz)		seq_printf(m, "%s", " vz");

	seq_printf(m, "\n");



	if (cpu_has_mmips) {

		seq_printf(m, "micromips kernel\t: %s\n",

		      (read_c0_config3() & MIPS_CONF3_ISA_OE) ?  "yes" : "no");

	}

	seq_printf(m, "shadow register sets\t: %d\n",

		      cpu_data[n].srsets);

	seq_printf(m, "kscratch registers\t: %d\n",