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git://projects.qi-hardware.com/openwrt-xburst.git
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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16547 3c298f89-4303-0410-b956-a3cf2f4a3e73
572 lines
16 KiB
Diff
572 lines
16 KiB
Diff
From 823ad3e6e88353226ec28f48183a467181887a1b Mon Sep 17 00:00:00 2001
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From: Kurt Mahan <kmahan@freescale.com>
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Date: Wed, 31 Oct 2007 16:56:09 -0600
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Subject: [PATCH] Core Coldfire/MCF54455 kernel changes.
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LTIBName: mcfv4e-kernel-mods
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Signed-off-by: Kurt Mahan <kmahan@freescale.com>
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---
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arch/m68k/Kconfig | 65 ++++++++++++++++++++++++++++++++++++++-
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arch/m68k/Kconfig.debug | 9 +++++
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arch/m68k/Makefile | 14 ++++++++
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arch/m68k/kernel/Makefile | 15 ++++++---
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arch/m68k/kernel/asm-offsets.c | 7 ++++
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arch/m68k/kernel/dma.c | 17 ++++++++++
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arch/m68k/kernel/process.c | 57 +++++++++++++++++++++++++++++++++++
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arch/m68k/kernel/setup.c | 49 ++++++++++++++++++++++++++----
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arch/m68k/kernel/time.c | 5 +++
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arch/m68k/kernel/vmlinux.lds.S | 2 +
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10 files changed, 227 insertions(+), 13 deletions(-)
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--- a/arch/m68k/Kconfig
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+++ b/arch/m68k/Kconfig
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@@ -119,6 +119,20 @@ config SUN3
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If you don't want to compile a kernel exclusively for a Sun 3, say N.
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+config COLDFIRE
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+ bool "ColdFire V4e support"
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+ default y
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+ select CFV4E
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+ help
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+ Say Y if you want to build a kernel to run on one of the ColdFire
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+ V4e boards.
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+
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+config CFV4E
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+ bool
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+ depends on COLDFIRE
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+ select MMU_CFV4E if MMU
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+ default y
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+
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config AMIGA
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bool "Amiga support"
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depends on !MMU_SUN3
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@@ -294,14 +308,53 @@ config M68060
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If you anticipate running this kernel on a computer with a MC68060
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processor, say Y. Otherwise, say N.
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+config M54455
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+ bool "MCF54455 support"
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+ depends on COLDFIRE
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+ default y
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+ help
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+ This option will add support for the MCF54455 processor with mmu.
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+
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+config MCFCLK
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+ int "M54455EVB System Clock"
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+ depends on M54455
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+ default 266666666
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+ help
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+ System clock for EVB. Usually 266MHz for u-boot and 200MHz for dBUG.
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+
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+config MCF_USER_HALT
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+ bool "Coldfire User Halt Enable"
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+ depends on M54455
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+ default n
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+ help
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+ Enables the HALT instruction in User Mode.
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+
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config MMU_MOTOROLA
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bool
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- depends on MMU && !MMU_SUN3
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+ depends on MMU && !MMU_SUN3 && !COLDFIRE
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default y
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config MMU_SUN3
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bool
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+config MMU_CFV4E
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+ bool
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+
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+config SDRAM_BASE
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+ hex
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+ depends on M54455
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+ default 0x40000000
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+
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+config SDRAM_SIZE
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+ hex
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+ depends on M54455
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+ default 0x0FFFFFFF
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+
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+config NOR_FLASH_BASE
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+ hex "NOR Flash Base Address"
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+ depends on M54455
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+ default 0x00000000
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+
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config M68KFPU_EMU
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bool "Math emulation support (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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@@ -468,6 +521,14 @@ config ZONE_DMA
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source "drivers/pci/Kconfig"
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source "drivers/zorro/Kconfig"
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+endmenu
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+
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+menu "Power management options"
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+
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+config PM
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+ bool "Power Management support"
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+ help
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+ Support processor power management modes
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endmenu
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@@ -647,7 +708,7 @@ config DN_SERIAL
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config SERIAL_CONSOLE
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bool "Support for serial port console"
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- depends on (AMIGA || ATARI || MAC || SUN3 || SUN3X || VME || APOLLO) && (ATARI_MFPSER=y || ATARI_SCC=y || ATARI_MIDI=y || MAC_SCC=y || AMIGA_BUILTIN_SERIAL=y || GVPIOEXT=y || MULTIFACE_III_TTY=y || SERIAL=y || MVME147_SCC || SERIAL167 || MVME162_SCC || BVME6000_SCC || DN_SERIAL)
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+ depends on (AMIGA || ATARI || MAC || SUN3 || SUN3X || VME || APOLLO || COLDFIRE) && (ATARI_MFPSER=y || ATARI_SCC=y || ATARI_MIDI=y || MAC_SCC=y || AMIGA_BUILTIN_SERIAL=y || GVPIOEXT=y || MULTIFACE_III_TTY=y || SERIAL=y || MVME147_SCC || SERIAL167 || MVME162_SCC || BVME6000_SCC || DN_SERIAL || SERIAL_COLDFIRE)
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---help---
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If you say Y here, it will be possible to use a serial port as the
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system console (the system console is the device which receives all
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--- a/arch/m68k/Kconfig.debug
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+++ b/arch/m68k/Kconfig.debug
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@@ -2,4 +2,13 @@ menu "Kernel hacking"
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source "lib/Kconfig.debug"
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+config BOOTPARAM
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+ bool 'Compiled-in Kernel Boot Parameter'
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+ depends on COLDFIRE
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+
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+config BOOTPARAM_STRING
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+ string 'Kernel Boot Parameter'
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+ default 'console=ttyS0,115200'
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+ depends on BOOTPARAM
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+
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endmenu
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--- a/arch/m68k/Makefile
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+++ b/arch/m68k/Makefile
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@@ -16,7 +16,9 @@
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KBUILD_DEFCONFIG := amiga_defconfig
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# override top level makefile
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+ifndef CONFIG_COLDFIRE
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AS += -m68020
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+endif
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LDFLAGS := -m m68kelf
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LDFLAGS_MODULE += -T $(srctree)/arch/m68k/kernel/module.lds
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ifneq ($(SUBARCH),$(ARCH))
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@@ -36,6 +38,7 @@ CHECKFLAGS += -D__mc68000__
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KBUILD_CFLAGS += -pipe -fno-strength-reduce -ffixed-a2
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# enable processor switch if compiled only for a single cpu
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+ifndef CONFIG_COLDFIRE
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ifndef CONFIG_M68020
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ifndef CONFIG_M68030
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@@ -49,6 +52,12 @@ endif
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endif
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endif
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+endif
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+
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+ifdef CONFIG_M54455
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+CFLAGS := $(CFLAGS) -march=isac -mcpu=54455 -msoft-float -g
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+AFLAGS := $(AFLAGS) -march=isac -mcpu=54455 -msoft-float
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+endif
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ifdef CONFIG_KGDB
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# If configured for kgdb support, include debugging infos and keep the
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@@ -57,8 +66,12 @@ KBUILD_CFLAGS := $(subst -fomit-frame-po
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endif
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ifndef CONFIG_SUN3
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+ifndef CONFIG_COLDFIRE
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head-y := arch/m68k/kernel/head.o
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else
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+head-y := arch/m68k/coldfire/head.o
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+endif
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+else
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head-y := arch/m68k/kernel/sun3-head.o
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endif
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@@ -79,6 +92,7 @@ core-$(CONFIG_SUN3) += arch/m68k/sun3/
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core-$(CONFIG_M68040) += arch/m68k/fpsp040/
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core-$(CONFIG_M68060) += arch/m68k/ifpsp060/
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core-$(CONFIG_M68KFPU_EMU) += arch/m68k/math-emu/
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+core-$(CONFIG_COLDFIRE) += arch/m68k/coldfire/
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all: zImage
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--- a/arch/m68k/kernel/Makefile
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+++ b/arch/m68k/kernel/Makefile
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@@ -2,14 +2,19 @@
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# Makefile for the linux kernel.
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#
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-ifndef CONFIG_SUN3
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- extra-y := head.o
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+ifdef CONFIG_SUN3
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+ extra-y := sun3-head.o vmlinux.lds
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+ obj-y := entry.o signal.o ints.o
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else
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- extra-y := sun3-head.o
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+ifndef CONFIG_COLDFIRE
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+ extra-y := head.o vmlinux.lds
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+ obj-y := entry.o signal.o traps.o ints.o
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+else # CONFIG_COLDFIRE
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+ extra-y := ../coldfire/head.o vmlinux.lds
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+endif
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endif
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-extra-y += vmlinux.lds
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-obj-y := entry.o process.o traps.o ints.o signal.o ptrace.o module.o \
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+obj-y += process.o ptrace.o module.o \
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sys_m68k.o time.o semaphore.o setup.o m68k_ksyms.o devres.o
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devres-y = ../../../kernel/irq/devres.o
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--- a/arch/m68k/kernel/asm-offsets.c
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+++ b/arch/m68k/kernel/asm-offsets.c
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@@ -58,8 +58,15 @@ int main(void)
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DEFINE(PT_A2, offsetof(struct pt_regs, a2));
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DEFINE(PT_PC, offsetof(struct pt_regs, pc));
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DEFINE(PT_SR, offsetof(struct pt_regs, sr));
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+#ifdef CONFIG_COLDFIRE
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+ /* Need to get the context out of struct mm for ASID setting */
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+ DEFINE(MM_CONTEXT, offsetof(struct mm_struct, context));
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+ /* Coldfire exception frame has vector *before* pc */
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+ DEFINE(PT_VECTOR, offsetof(struct pt_regs, pc) - 4);
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+#else
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/* bitfields are a bit difficult */
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DEFINE(PT_VECTOR, offsetof(struct pt_regs, pc) + 4);
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+#endif
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/* offsets into the irq_handler struct */
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DEFINE(IRQ_HANDLER, offsetof(struct irq_node, handler));
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--- a/arch/m68k/kernel/dma.c
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+++ b/arch/m68k/kernel/dma.c
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@@ -17,6 +17,7 @@
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void *dma_alloc_coherent(struct device *dev, size_t size,
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dma_addr_t *handle, gfp_t flag)
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{
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+#ifndef CONFIG_M54455
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struct page *page, **map;
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pgprot_t pgprot;
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void *addr;
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@@ -55,6 +56,18 @@ void *dma_alloc_coherent(struct device *
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kfree(map);
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return addr;
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+#else
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+ /*
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+ * On the M5445x platform the memory allocated with GFP_DMA
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+ * is guaranteed to be DMA'able.
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+ */
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+ void *addr;
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+
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+ size = PAGE_ALIGN(size);
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+ addr = kmalloc(size, GFP_DMA);
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+ *handle = virt_to_phys(addr);
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+ return addr;
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+#endif
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}
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EXPORT_SYMBOL(dma_alloc_coherent);
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@@ -62,7 +75,11 @@ void dma_free_coherent(struct device *de
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void *addr, dma_addr_t handle)
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{
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pr_debug("dma_free_coherent: %p, %x\n", addr, handle);
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+#ifndef CONFIG_M54455
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vfree(addr);
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+#else
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+ kfree(addr);
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+#endif
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}
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EXPORT_SYMBOL(dma_free_coherent);
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--- a/arch/m68k/kernel/process.c
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+++ b/arch/m68k/kernel/process.c
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@@ -191,6 +191,7 @@ EXPORT_SYMBOL(kernel_thread);
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void flush_thread(void)
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{
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+#if !defined(CONFIG_COLDFIRE)
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unsigned long zero = 0;
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set_fs(USER_DS);
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current->thread.fs = __USER_DS;
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@@ -198,6 +199,14 @@ void flush_thread(void)
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asm volatile (".chip 68k/68881\n\t"
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"frestore %0@\n\t"
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".chip 68k" : : "a" (&zero));
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+#else
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+ set_fs(USER_DS);
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+ current->thread.fs = USER_DS;
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+#if defined(CONFIG_FPU)
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+ if (!FPU_IS_EMU)
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+ asm volatile ("frestore %0@\n\t" : : "a" (&zero));
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+#endif
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+#endif
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}
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/*
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@@ -261,6 +270,7 @@ int copy_thread(int nr, unsigned long cl
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* Must save the current SFC/DFC value, NOT the value when
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* the parent was last descheduled - RGH 10-08-96
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*/
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+#if !defined(CONFIG_COLDFIRE)
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p->thread.fs = get_fs().seg;
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if (!FPU_IS_EMU) {
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@@ -272,9 +282,34 @@ int copy_thread(int nr, unsigned long cl
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"fmoveml %/fpiar/%/fpcr/%/fpsr,%1"
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: : "m" (p->thread.fp[0]), "m" (p->thread.fpcntl[0])
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: "memory");
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+#else
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+ p->thread.fs = get_fs();
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+
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+#if defined(CONFIG_FPU)
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+ if (!FPU_IS_EMU) {
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+ /* Copy the current fpu state */
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+ asm volatile ("fsave %0" : : "m" (p->thread.fpstate[0])
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+ : "memory");
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+
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+ if (p->thread.fpstate[0]) {
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+ asm volatile ("fmovemd %/fp0-%/fp7,%0"
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+ : : "m" (p->thread.fp[0])
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+ : "memory");
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+ asm volatile ("fmovel %/fpiar,%0"
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+ : : "m" (p->thread.fpcntl[0])
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+ : "memory");
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+ asm volatile ("fmovel %/fpcr,%0"
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+ : : "m" (p->thread.fpcntl[1])
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+ : "memory");
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+ asm volatile ("fmovel %/fpsr,%0"
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+ : : "m" (p->thread.fpcntl[2])
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+ : "memory");
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+ }
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/* Restore the state in case the fpu was busy */
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asm volatile ("frestore %0" : : "m" (p->thread.fpstate[0]));
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}
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+#endif
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+#endif
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return 0;
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}
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@@ -283,7 +318,9 @@ int copy_thread(int nr, unsigned long cl
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int dump_fpu (struct pt_regs *regs, struct user_m68kfp_struct *fpu)
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{
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+#if !defined(CONFIG_COLDFIRE) || defined(CONFIG_FPU)
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char fpustate[216];
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+#endif
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if (FPU_IS_EMU) {
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int i;
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@@ -300,6 +337,7 @@ int dump_fpu (struct pt_regs *regs, stru
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}
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/* First dump the fpu context to avoid protocol violation. */
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+#if !defined(CONFIG_COLDFIRE)
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asm volatile ("fsave %0" :: "m" (fpustate[0]) : "memory");
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if (!CPU_IS_060 ? !fpustate[0] : !fpustate[2])
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return 0;
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@@ -310,6 +348,25 @@ int dump_fpu (struct pt_regs *regs, stru
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asm volatile ("fmovemx %/fp0-%/fp7,%0"
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:: "m" (fpu->fpregs[0])
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: "memory");
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+#elif defined(CONFIG_FPU)
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+ asm volatile ("fsave %0" :: "m" (fpustate[0]) : "memory");
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+ if (!CPU_IS_060 ? !fpustate[0] : !fpustate[2])
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+ return 0;
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+
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+ asm volatile ("fmovel %/fpiar,%0"
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+ : : "m" (fpu->fpcntl[0])
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+ : "memory");
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+ asm volatile ("fmovel %/fpcr,%0"
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+ : : "m" (fpu->fpcntl[1])
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+ : "memory");
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+ asm volatile ("fmovel %/fpsr,%0"
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+ : : "m" (fpu->fpcntl[2])
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+ : "memory");
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+ asm volatile ("fmovemd %/fp0-%/fp7,%0"
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+ : : "m" (fpu->fpregs[0])
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+ : "memory");
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+#endif
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+
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return 1;
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}
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EXPORT_SYMBOL(dump_fpu);
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--- a/arch/m68k/kernel/setup.c
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+++ b/arch/m68k/kernel/setup.c
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@@ -67,13 +67,22 @@ EXPORT_SYMBOL(m68k_memory);
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struct mem_info m68k_ramdisk;
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+#if !defined(CONFIG_COLDFIRE)
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static char m68k_command_line[CL_SIZE];
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+#else
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+char m68k_command_line[CL_SIZE];
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+unsigned long uboot_info_stk;
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+EXPORT_SYMBOL(uboot_info_stk);
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+#endif
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void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
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/* machine dependent irq functions */
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void (*mach_init_IRQ) (void) __initdata = NULL;
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void (*mach_get_model) (char *model);
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int (*mach_get_hardware_list) (char *buffer);
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+#ifdef CONFIG_COLDFIRE
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+void (*mach_tick)(void);
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+#endif
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/* machine dependent timer functions */
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unsigned long (*mach_gettimeoffset) (void);
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int (*mach_hwclk) (int, struct rtc_time*);
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@@ -128,13 +137,17 @@ extern void config_hp300(void);
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extern void config_q40(void);
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extern void config_sun3x(void);
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+#ifdef CONFIG_COLDFIRE
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+void coldfire_sort_memrec(void);
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+#endif
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+
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#define MASK_256K 0xfffc0000
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extern void paging_init(void);
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static void __init m68k_parse_bootinfo(const struct bi_record *record)
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{
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- while (record->tag != BI_LAST) {
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+ while ((record->tag != BI_LAST) && !(CONFIG_COLDFIRE)) {
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int unknown = 0;
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const unsigned long *data = record->data;
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@@ -192,7 +205,11 @@ static void __init m68k_parse_bootinfo(c
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record->size);
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}
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- m68k_realnum_memory = m68k_num_memory;
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+#ifdef CONFIG_COLDFIRE
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+ coldfire_sort_memrec();
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+#endif
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+
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+ m68k_realnum_memory = m68k_num_memory;
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#ifdef CONFIG_SINGLE_MEMORY_CHUNK
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if (m68k_num_memory > 1) {
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printk("Ignoring last %i chunks of physical memory\n",
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@@ -205,7 +222,9 @@ static void __init m68k_parse_bootinfo(c
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void __init setup_arch(char **cmdline_p)
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{
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extern int _etext, _edata, _end;
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+#if !defined(CONFIG_SUN3) && !defined(CONFIG_COLDFIRE)
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int i;
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+#endif
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/* The bootinfo is located right after the kernel bss */
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m68k_parse_bootinfo((const struct bi_record *)&_end);
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@@ -220,9 +239,10 @@ void __init setup_arch(char **cmdline_p)
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* We should really do our own FPU check at startup.
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* [what do we do with buggy 68LC040s? if we have problems
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* with them, we should add a test to check_bugs() below] */
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-#ifndef CONFIG_M68KFPU_EMU_ONLY
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+#if !defined(CONFIG_M68KFPU_EMU_ONLY) && defined(CONFIG_FPU)
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/* clear the fpu if we have one */
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- if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
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+ if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|
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+ FPU_CFV4E)) {
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volatile int zero = 0;
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asm volatile ("frestore %0" : : "m" (zero));
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}
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@@ -310,13 +330,18 @@ void __init setup_arch(char **cmdline_p)
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config_sun3x();
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break;
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#endif
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+#ifdef CONFIG_COLDFIRE
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+ case MACH_CFMMU:
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+ config_coldfire();
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+ break;
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+#endif
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default:
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panic("No configuration setup");
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}
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paging_init();
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-#ifndef CONFIG_SUN3
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+#if !defined(CONFIG_SUN3) && !defined(CONFIG_COLDFIRE)
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for (i = 1; i < m68k_num_memory; i++)
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free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
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m68k_memory[i].size);
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@@ -343,6 +368,10 @@ void __init setup_arch(char **cmdline_p)
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#endif /* !CONFIG_SUN3 */
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+#ifdef CONFIG_COLDFIRE
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+ mmu_context_init();
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+#endif
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+
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/* set ISA defs early as possible */
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#if defined(CONFIG_ISA) && defined(MULTI_ISA)
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#if defined(CONFIG_Q40)
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@@ -373,6 +402,7 @@ static int show_cpuinfo(struct seq_file
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#define LOOP_CYCLES_68030 (8)
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#define LOOP_CYCLES_68040 (3)
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#define LOOP_CYCLES_68060 (1)
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+#define LOOP_CYCLES_COLDFIRE (2)
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if (CPU_IS_020) {
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cpu = "68020";
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@@ -386,6 +416,9 @@ static int show_cpuinfo(struct seq_file
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} else if (CPU_IS_060) {
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cpu = "68060";
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clockfactor = LOOP_CYCLES_68060;
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+ } else if (CPU_IS_CFV4E) {
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+ cpu = "ColdFire V4e";
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+ clockfactor = LOOP_CYCLES_COLDFIRE;
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} else {
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cpu = "680x0";
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clockfactor = 0;
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@@ -404,6 +437,8 @@ static int show_cpuinfo(struct seq_file
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fpu = "68060";
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else if (m68k_fputype & FPU_SUNFPA)
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fpu = "Sun FPA";
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+ else if (m68k_fputype & FPU_CFV4E)
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+ fpu = "ColdFire V4e";
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else
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fpu = "none";
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#endif
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@@ -420,6 +455,8 @@ static int show_cpuinfo(struct seq_file
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mmu = "Sun-3";
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else if (m68k_mmutype & MMU_APOLLO)
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mmu = "Apollo";
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+ else if (m68k_mmutype & MMU_CFV4E)
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+ mmu = "ColdFire";
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else
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mmu = "unknown";
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@@ -482,7 +519,7 @@ int get_hardware_list(char *buffer)
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void check_bugs(void)
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{
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-#ifndef CONFIG_M68KFPU_EMU
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+#if !defined(CONFIG_M68KFPU_EMU) && !defined(CONFIG_M54455)
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if (m68k_fputype == 0) {
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printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
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"WHICH IS REQUIRED BY LINUX/M68K ***\n");
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--- a/arch/m68k/kernel/time.c
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+++ b/arch/m68k/kernel/time.c
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@@ -40,6 +40,11 @@ static inline int set_rtc_mmss(unsigned
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*/
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static irqreturn_t timer_interrupt(int irq, void *dummy)
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{
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+#ifdef CONFIG_COLDFIRE
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+ /* kick hardware timer if necessary */
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+ if (mach_tick)
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+ mach_tick();
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+#endif
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do_timer(1);
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#ifndef CONFIG_SMP
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update_process_times(user_mode(get_irq_regs()));
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--- a/arch/m68k/kernel/vmlinux.lds.S
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+++ b/arch/m68k/kernel/vmlinux.lds.S
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@@ -5,6 +5,8 @@ PHDRS
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}
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#ifdef CONFIG_SUN3
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#include "vmlinux-sun3.lds"
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+#elif CONFIG_COLDFIRE
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+#include "../coldfire/vmlinux-cf.lds"
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#else
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#include "vmlinux-std.lds"
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#endif
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