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sh: Provide a 29/32-bit physical hint for bootloaders.
Shoves a magic word in to the empty_zero_page section for the bootloader to work out whether to start the kernel in 29-bit or 32-bit mode. [ Renesas CPUs already take care of the initial PMB mappings entirely in hardware and decide on 29-bit/32-bit physical depending on which pin powered up the CPU, so this is mostly for ST parts. -- PFM ]. Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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1 changed files with 5 additions and 1 deletions
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@ -32,7 +32,11 @@ ENTRY(empty_zero_page)
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.long 1 /* LOADER_TYPE */
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.long 0x00360000 /* INITRD_START */
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.long 0x000a0000 /* INITRD_SIZE */
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.long 0
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#ifdef CONFIG_32BIT
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.long 0x53453f00 + 32 /* "SE?" = 32 bit */
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#else
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.long 0x53453f00 + 29 /* "SE?" = 29 bit */
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#endif
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1:
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.skip PAGE_SIZE - empty_zero_page - 1b
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