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| author | Linus Walleij <linus.walleij@linaro.org> | 2021-06-03 09:51:21 +0100 |
|---|---|---|
| committer | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2021-06-13 18:16:41 +0100 |
| commit | a91da54570856e3d3af4ba2884db71fbce06f70b (patch) | |
| tree | 6a7cfbf300f11676e139292794744a472cef7e1b /arch/arm/include | |
| parent | b78f63f4439bbfd02bfc628114ed0f63460e5570 (diff) | |
| download | lwn-a91da54570856e3d3af4ba2884db71fbce06f70b.tar.gz lwn-a91da54570856e3d3af4ba2884db71fbce06f70b.zip | |
ARM: 9089/1: Define kernel physical section start and end
When we are mapping the initial sections in head.S we
know very well where the start and end of the kernel image
in physical memory is placed. Later on it gets hard
to determine this.
Save the information into two variables named
kernel_sec_start and kernel_sec_end for convenience
for later work involving the physical start and end
of the kernel. These variables are section-aligned
corresponding to the early section mappings set up
in head.S.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/asm/memory.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h index a5f1d1826a98..ca213d7d095f 100644 --- a/arch/arm/include/asm/memory.h +++ b/arch/arm/include/asm/memory.h @@ -159,6 +159,13 @@ extern unsigned long vectors_base; #ifndef __ASSEMBLY__ /* + * Physical start and end address of the kernel sections. These addresses are + * 2MB-aligned to match the section mappings placed over the kernel. + */ +extern phys_addr_t kernel_sec_start; +extern phys_addr_t kernel_sec_end; + +/* * Physical vs virtual RAM address space conversion. These are * private definitions which should NOT be used outside memory.h * files. Use virt_to_phys/phys_to_virt/__pa/__va instead. |