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authorMax Filippov <jcmvbkbc@gmail.com>2017-01-04 04:57:51 +0300
committerMax Filippov <jcmvbkbc@gmail.com>2019-11-26 22:33:38 +0300
commit7af710d988775aadf440222ecbe0c10eecf3eb54 (patch)
treef499a51c705441d0aa2019ef88f13e8598627b92 /arch/xtensa/Makefile
parent76743c0e0915af6ae1d960c14e8c1dcb3e238f23 (diff)
downloadlinux-7af710d988775aadf440222ecbe0c10eecf3eb54.tar.xz
xtensa: add XIP kernel support
XIP (eXecute In Place) kernel image is the image that can be run directly from ROM, using RAM only for writable data. XIP xtensa kernel differs from regular xtensa kernel in the following ways: - it has exception/IRQ vectors merged into text section. No vectors relocation takes place at kernel startup. - .data/.bss location must be specified in the kernel configuration, its content is copied there in the _startup function. - .init.text is merged with the rest of text and is executed from ROM. - when MMU is used the virtual address where the kernel will be mapped must be specified in the kernel configuration. It may be in the KSEG or in the KIO, __pa macro is adjusted to be able to handle both. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/xtensa/Makefile')
-rw-r--r--arch/xtensa/Makefile3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/xtensa/Makefile b/arch/xtensa/Makefile
index 1542018c9e57..67a7d151d1e7 100644
--- a/arch/xtensa/Makefile
+++ b/arch/xtensa/Makefile
@@ -87,7 +87,7 @@ drivers-$(CONFIG_OPROFILE) += arch/xtensa/oprofile/
boot := arch/xtensa/boot
-all Image zImage uImage: vmlinux
+all Image zImage uImage xipImage: vmlinux
$(Q)$(MAKE) $(build)=$(boot) $@
archheaders:
@@ -97,4 +97,5 @@ define archhelp
@echo '* Image - Kernel ELF image with reset vector'
@echo '* zImage - Compressed kernel image (arch/xtensa/boot/images/zImage.*)'
@echo '* uImage - U-Boot wrapped image'
+ @echo ' xipImage - XIP image'
endef