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![Alexey Brodkin](/assets/img/avatar_default.png)
ARC HS and ARC EM are new cores based on ARCv2 ISA which is binary incompatible with ISAv1 (AKA ARCompact). Significant difference between ISAv2 and v1 is implementation of interrupt vector table. In v1 it is implemented in the same way as on many other architectures - as a special location where user may put whether code executed in place (if machine word of space is enough) or jump to a full-scale interrupt handler. In v2 interrupt table is just an array of adresses of real interrupt handlers. That requires a separate section for IVT that is not encoded as code by assembler. This change adds support for following cores: * ARC EM6 (simple 32-bit microcontroller without MMU) * ARC HS36 (advanced 32-bit microcontroller without MMU) * ARC HS38 (advanced 32-bit microcontroller with MMU) As a part of ARC HS38 new version of MMU (v4) was introduced. Also this change adds AXS131 board which is the same DW ARC SDP base board but with ARC HS38 CPU tile. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
152 lines
3.0 KiB
Plaintext
152 lines
3.0 KiB
Plaintext
menu "ARC architecture"
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depends on ARC
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config SYS_ARCH
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default "arc"
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config USE_PRIVATE_LIBGCC
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default y
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config SYS_CPU
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default "arcv1" if ISA_ARCOMPACT
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default "arcv2" if ISA_ARCV2
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choice
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prompt "ARC Instruction Set"
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default ISA_ARCOMPACT
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config ISA_ARCOMPACT
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bool "ARCompact ISA"
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help
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The original ARC ISA of ARC600/700 cores
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config ISA_ARCV2
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bool "ARC ISA v2"
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help
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ISA for the Next Generation ARC-HS cores
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endchoice
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choice
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prompt "CPU selection"
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default CPU_ARC770D if ISA_ARCOMPACT
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default CPU_ARCHS38 if ISA_ARCV2
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config CPU_ARC750D
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bool "ARC 750D"
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select ARC_MMU_V2
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depends on ISA_ARCOMPACT
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help
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Choose this option to build an U-Boot for ARC750D CPU.
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config CPU_ARC770D
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bool "ARC 770D"
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select ARC_MMU_V3
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depends on ISA_ARCOMPACT
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help
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Choose this option to build an U-Boot for ARC770D CPU.
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config CPU_ARCEM6
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bool "ARC EM6"
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select ARC_MMU_ABSENT
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depends on ISA_ARCV2
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help
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Next Generation ARC Core based on ISA-v2 ISA without MMU.
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config CPU_ARCHS36
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bool "ARC HS36"
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select ARC_MMU_ABSENT
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depends on ISA_ARCV2
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help
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Next Generation ARC Core based on ISA-v2 ISA without MMU.
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config CPU_ARCHS38
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bool "ARC HS38"
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select ARC_MMU_V4
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depends on ISA_ARCV2
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help
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Next Generation ARC Core based on ISA-v2 ISA with MMU.
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endchoice
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choice
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prompt "MMU Version"
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default ARC_MMU_V3 if CPU_ARC770D
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default ARC_MMU_V2 if CPU_ARC750D
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default ARC_MMU_ABSENT if CPU_ARCEM6
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default ARC_MMU_ABSENT if CPU_ARCHS36
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default ARC_MMU_V4 if CPU_ARCHS38
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config ARC_MMU_ABSENT
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bool "No MMU"
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help
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No MMU
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config ARC_MMU_V2
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bool "MMU v2"
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depends on CPU_ARC750D
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help
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Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio
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when 2 D-TLB and 1 I-TLB entries index into same 2way set.
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config ARC_MMU_V3
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bool "MMU v3"
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depends on CPU_ARC770D
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help
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Introduced with ARC700 4.10: New Features
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Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
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Shared Address Spaces (SASID)
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config ARC_MMU_V4
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bool "MMU v4"
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depends on CPU_ARCHS38
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help
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Introduced as a part of ARC HS38 release.
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endchoice
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config CPU_BIG_ENDIAN
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bool "Enable Big Endian Mode"
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default n
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help
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Build kernel for Big Endian Mode of ARC CPU
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config SYS_ICACHE_OFF
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bool "Do not use Instruction Cache"
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default n
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config SYS_DCACHE_OFF
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bool "Do not use Data Cache"
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default n
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config ARC_CACHE_LINE_SHIFT
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int "Cache Line Length (as power of 2)"
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range 5 7
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default "6"
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depends on !SYS_DCACHE_OFF || !SYS_DCACHE_OFF
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help
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Starting with ARC700 4.9, Cache line length is configurable,
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This option specifies "N", with Line-len = 2 power N
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So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
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Linux only supports same line lengths for I and D caches.
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choice
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prompt "Target select"
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config TARGET_TB100
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bool "Support tb100"
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config TARGET_ARCANGEL4
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bool "Support arcangel4"
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config TARGET_AXS101
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bool "Support axs101"
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endchoice
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source "board/abilis/tb100/Kconfig"
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source "board/synopsys/Kconfig"
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source "board/synopsys/axs101/Kconfig"
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endmenu
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