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mips: add an option to support initialize SRAM for initial stack
Currently CONFIG_MIPS_INIT_STACK_IN_SRAM assumes the memory space for the initial stack can be used directly. However on some platform the SRAM needs initialization, e.g. lock cache. This patch adds an option to allow a new function mips_sram_init() being called before setup_stack_gd. Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com> Reviewed-by: Stefan Roese <sr@denx.de> Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
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@ -425,6 +425,15 @@ config MIPS_INIT_STACK_IN_SRAM
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lowlevel_init. Thus lowlevel_init does not need to be implemented
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in assembler.
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config MIPS_SRAM_INIT
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bool
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default n
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depends on MIPS_INIT_STACK_IN_SRAM
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help
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Select this if the SRAM for initial stack needs to be initialized
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before it can be used. If enabled, a function mips_sram_init() will
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be called just before setup_stack_gd.
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config SYS_DCACHE_SIZE
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int
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default 0
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@ -217,6 +217,13 @@ wr_done:
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#endif
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#ifdef CONFIG_MIPS_INIT_STACK_IN_SRAM
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#ifdef CONFIG_MIPS_SRAM_INIT
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/* Initialize the SRAM first */
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PTR_LA t9, mips_sram_init
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jalr t9
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nop
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#endif
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/* Set up initial stack and global data */
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setup_stack_gd
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