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armv8: aarch64: Fix the warning about x1-x3 nonzero issue

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For 64-bit kernel, there is a warning about x1-x3 nonzero in violation
of boot protocol. To fix this issue, input argument 4 is added for
armv8_switch_to_el2 and armv8_switch_to_el1. The input argument 4 will
be set to the right value, such as zero.

Signed-off-by: Alison Wang <alison.wang@nxp.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Tested-by: Ryan Harkin <ryan.harkin@linaro.org>
Tested-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: York Sun <york.sun@nxp.com>
This commit is contained in:
Alison Wang
2017-01-17 09:39:17 +08:00
committed by York Sun
parent 2ca84bf7b2
commit 7c5e1feb1d
8 changed files with 47 additions and 45 deletions
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8
arch/arm/include/asm/system.h
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@@ -196,11 +196,12 @@ void __asm_switch_ttbr(u64 new_ttbr);
* For loading 32-bit OS, machine nr
* @fdt_addr: For loading 64-bit OS, zero.
* For loading 32-bit OS, fdt address.
* @arg4: Input argument.
* @entry_point: kernel entry point
* @es_flag: execution state flag, ES_TO_AARCH64 or ES_TO_AARCH32
*/
void armv8_switch_to_el2(u64 args, u64 mach_nr, u64 fdt_addr,
u64 entry_point, u64 es_flag);
u64 arg4, u64 entry_point, u64 es_flag);
/*
* Switch from EL2 to EL1 for ARMv8
*
@@ -210,13 +211,14 @@ void armv8_switch_to_el2(u64 args, u64 mach_nr, u64 fdt_addr,
* For loading 32-bit OS, machine nr
* @fdt_addr: For loading 64-bit OS, zero.
* For loading 32-bit OS, fdt address.
* @arg4: Input argument.
* @entry_point: kernel entry point
* @es_flag: execution state flag, ES_TO_AARCH64 or ES_TO_AARCH32
*/
void armv8_switch_to_el1(u64 args, u64 mach_nr, u64 fdt_addr,
u64 entry_point, u64 es_flag);
u64 arg4, u64 entry_point, u64 es_flag);
void armv8_el2_to_aarch32(u64 args, u64 mach_nr, u64 fdt_addr,
u64 entry_point);
u64 arg4, u64 entry_point);
void gic_init(void);
void gic_send_sgi(unsigned long sgino);
void wait_for_wakeup(void);