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@@ -562,6 +562,7 @@ config QEMU
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select SWAP_IO_SPACE
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select SYS_SUPPORTS_32BIT_KERNEL
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select SYS_SUPPORTS_BIG_ENDIAN
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+ select SYS_SUPPORTS_HIGHMEM
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help
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Qemu is a software emulator which among other architectures also
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can simulate a MIPS32 4Kc system. This patch adds support for the
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@@ -759,6 +760,10 @@ config MIPS_PB1200
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select DMA_NONCOHERENT
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select MIPS_DISABLE_OBSOLETE_IDE
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select SYS_SUPPORTS_BIG_ENDIAN
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+ select SYS_SUPPORTS_HIGHMEM
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+ select SYS_SUPPORTS_HIGHMEM
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+ select SYS_SUPPORTS_HIGHMEM
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+ select SYS_SUPPORTS_HIGHMEM
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select SYS_SUPPORTS_LITTLE_ENDIAN
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config MIPS_DB1000
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@@ -829,6 +834,7 @@ config SNI_RM200_PCI
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select ISA
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select SYS_SUPPORTS_32BIT_KERNEL
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select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
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+ select SYS_SUPPORTS_HIGHMEM
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help
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The SNI RM200 PCI was a MIPS-based platform manufactured by Siemens
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Nixdorf Informationssysteme (SNI), parent company of Pyramid
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@@ -913,6 +919,7 @@ config I8259
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config LIMITED_DMA
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bool
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select HIGHMEM
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+ select SYS_SUPPORTS_HIGHMEM
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config MIPS_BONITO64
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bool
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@@ -1105,8 +1112,8 @@ choice
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config CPU_MIPS32_R1
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bool "MIPS32 Release 1"
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- select CPU_SUPPORTS_32BIT_KERNEL
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select CPU_HAS_PREFETCH
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+ select CPU_SUPPORTS_32BIT_KERNEL
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help
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Choose this option to build a kernel for release 2 or later of the
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MIPS32 architecture. Most modern embedded systems with a 32-bit
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@@ -1120,8 +1127,8 @@ config CPU_MIPS32_R1
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config CPU_MIPS32_R2
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bool "MIPS32 Release 2"
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- select CPU_SUPPORTS_32BIT_KERNEL
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select CPU_HAS_PREFETCH
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+ select CPU_SUPPORTS_32BIT_KERNEL
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help
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Choose this option to build a kernel for release 1 or later of the
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MIPS32 architecture. Most modern embedded systems with a 32-bit
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@@ -1131,9 +1138,9 @@ config CPU_MIPS32_R2
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config CPU_MIPS64_R1
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bool "MIPS64 Release 1"
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+ select CPU_HAS_PREFETCH
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select CPU_SUPPORTS_32BIT_KERNEL
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select CPU_SUPPORTS_64BIT_KERNEL
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- select CPU_HAS_PREFETCH
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help
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Choose this option to build a kernel for release 1 or later of the
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MIPS64 architecture. Many modern embedded systems with a 64-bit
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@@ -1147,9 +1154,9 @@ config CPU_MIPS64_R1
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config CPU_MIPS64_R2
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bool "MIPS64 Release 2"
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+ select CPU_HAS_PREFETCH
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select CPU_SUPPORTS_32BIT_KERNEL
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select CPU_SUPPORTS_64BIT_KERNEL
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- select CPU_HAS_PREFETCH
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help
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Choose this option to build a kernel for release 2 or later of the
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MIPS64 architecture. Many modern embedded systems with a 64-bit
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@@ -1160,6 +1167,7 @@ config CPU_MIPS64_R2
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config CPU_R3000
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bool "R3000"
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select CPU_SUPPORTS_32BIT_KERNEL
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+ select CPU_SUPPORTS_HIGHMEM
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help
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Please make sure to pick the right CPU type. Linux/MIPS is not
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designed to be generic, i.e. Kernels compiled for R3000 CPUs will
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@@ -1239,6 +1247,7 @@ config CPU_R10000
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bool "R10000"
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select CPU_SUPPORTS_32BIT_KERNEL
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select CPU_SUPPORTS_64BIT_KERNEL
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+ select CPU_SUPPORTS_HIGHMEM
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help
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MIPS Technologies R10000-series processors.
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@@ -1246,16 +1255,19 @@ config CPU_RM7000
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bool "RM7000"
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select CPU_SUPPORTS_32BIT_KERNEL
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select CPU_SUPPORTS_64BIT_KERNEL
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+ select CPU_SUPPORTS_HIGHMEM
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config CPU_RM9000
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bool "RM9000"
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select CPU_SUPPORTS_32BIT_KERNEL
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select CPU_SUPPORTS_64BIT_KERNEL
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+ select CPU_SUPPORTS_HIGHMEM
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config CPU_SB1
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bool "SB1"
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select CPU_SUPPORTS_32BIT_KERNEL
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select CPU_SUPPORTS_64BIT_KERNEL
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+ select CPU_SUPPORTS_HIGHMEM
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endchoice
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@@ -1442,6 +1454,17 @@ config CPU_HAS_SYNC
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depends on !CPU_R3000
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default y
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+#
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+# Use the generic interrupt handling code in kernel/irq/:
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+#
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+config GENERIC_HARDIRQS
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+ bool
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+ default y
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+
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+config GENERIC_IRQ_PROBE
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+ bool
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+ default y
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+
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#
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# - Highmem only makes sense for the 32-bit kernel.
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# - The current highmem code will only work properly on physically indexed
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@@ -1451,14 +1474,19 @@ config CPU_HAS_SYNC
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# where it's known to be safe. This will not offer highmem on a few systems
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# such as MIPS32 and MIPS64 CPUs which may have virtual and physically
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# indexed CPUs but we're playing safe.
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-# - We should not offer highmem for system of which we already know that they
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-# don't have memory configurations that could gain from highmem support in
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-# the kernel because they don't support configurations with RAM at physical
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-# addresses > 0x20000000.
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+# - We use SYS_SUPPORTS_HIGHMEM to offer highmem only for systems where we
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+# know they might have memory configurations that could make use of highmem
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+# support.
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#
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config HIGHMEM
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bool "High Memory Support"
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- depends on 32BIT && (CPU_R3000 || CPU_SB1 || CPU_R7000 || CPU_RM9000 || CPU_R10000) && !(MACH_DECSTATION || MOMENCO_JAGUAR_ATX)
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+ depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM
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+
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+config CPU_SUPPORTS_HIGHMEM
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+ bool
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+
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+config SYS_SUPPORTS_HIGHMEM
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+ bool
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config ARCH_FLATMEM_ENABLE
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def_bool y
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@@ -1708,17 +1736,6 @@ source "crypto/Kconfig"
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source "lib/Kconfig"
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-#
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-# Use the generic interrupt handling code in kernel/irq/:
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-#
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-config GENERIC_HARDIRQS
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- bool
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- default y
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-
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-config GENERIC_IRQ_PROBE
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- bool
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- default y
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-
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config ISA_DMA_API
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bool
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default y
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Ralf Baechle