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arm: make save_boot_params_ret prototype visible for AArch64

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The save_boot_params_ret() prototype (for those of us, that have a
valid SP on entry and can implement save_boot_params() in C), was
previously only defined for !defined(CONFIG_ARM64).

This moves the declaration to a common block to ensure the prototype
is available to everyone that might need it.

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Tested-by: Andy Yan <andy.yan@rock-chips.com>
This commit is contained in:
Philipp Tomsich 2017-10-10 16:21:11 +02:00
parent b377d22264
commit 7776cc011d
1 changed files with 31 additions and 31 deletions
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62
arch/arm/include/asm/system.h
View file

@ -332,37 +332,6 @@ void psci_arch_init(void);
#ifndef __ASSEMBLY__
/**
* save_boot_params() - Save boot parameters before starting reset sequence
*
* If you provide this function it will be called immediately U-Boot starts,
* both for SPL and U-Boot proper.
*
* All registers are unchanged from U-Boot entry. No registers need be
* preserved.
*
* This is not a normal C function. There is no stack. Return by branching to
* save_boot_params_ret.
*
* void save_boot_params(u32 r0, u32 r1, u32 r2, u32 r3);
*/
/**
* save_boot_params_ret() - Return from save_boot_params()
*
* If you provide save_boot_params(), then you should jump back to this
* function when done. Try to preserve all registers.
*
* If your implementation of save_boot_params() is in C then it is acceptable
* to simply call save_boot_params_ret() at the end of your function. Since
* there is no link register set up, you cannot just exit the function. U-Boot
* will return to the (initialised) value of lr, and likely crash/hang.
*
* If your implementation of save_boot_params() is in assembler then you
* should use 'b' or 'bx' to return to save_boot_params_ret.
*/
void save_boot_params_ret(void);
#ifdef CONFIG_ARMV7_LPAE
void switch_to_hypervisor_ret(void);
#endif
@ -555,6 +524,37 @@ void mmu_page_table_flush(unsigned long start, unsigned long stop);
#endif /* CONFIG_ARM64 */
#ifndef __ASSEMBLY__
/**
* save_boot_params() - Save boot parameters before starting reset sequence
*
* If you provide this function it will be called immediately U-Boot starts,
* both for SPL and U-Boot proper.
*
* All registers are unchanged from U-Boot entry. No registers need be
* preserved.
*
* This is not a normal C function. There is no stack. Return by branching to
* save_boot_params_ret.
*
* void save_boot_params(u32 r0, u32 r1, u32 r2, u32 r3);
*/
/**
* save_boot_params_ret() - Return from save_boot_params()
*
* If you provide save_boot_params(), then you should jump back to this
* function when done. Try to preserve all registers.
*
* If your implementation of save_boot_params() is in C then it is acceptable
* to simply call save_boot_params_ret() at the end of your function. Since
* there is no link register set up, you cannot just exit the function. U-Boot
* will return to the (initialised) value of lr, and likely crash/hang.
*
* If your implementation of save_boot_params() is in assembler then you
* should use 'b' or 'bx' to return to save_boot_params_ret.
*/
void save_boot_params_ret(void);
/**
* Change the cache settings for a region.
*