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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b4e6153704
Building the kernel with allyesconfig fails because the i.mx early resume code located in the .data section is unable to fixup the bl relocation as the branch target gets too far away. The idea of having code in the .data section allows for easy access to nearby data using relative addressing while the MMU is off. However it is probably best to move the code back to the .text section where it belongs and fixup the data access instead. This solves the bl reloc issue (at least until this becomes a general problem) and simplifies the code as well. Signed-off-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
60 lines
1.3 KiB
ArmAsm
60 lines
1.3 KiB
ArmAsm
/*
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* Copyright 2011 Freescale Semiconductor, Inc.
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* Copyright 2011 Linaro Ltd.
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*
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* The code contained herein is licensed under the GNU General Public
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* License. You may obtain a copy of the GNU General Public License
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* Version 2 or later at the following locations:
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*
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* http://www.opensource.org/licenses/gpl-license.html
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* http://www.gnu.org/copyleft/gpl.html
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*/
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#include <linux/linkage.h>
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#include <linux/init.h>
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#include <asm/asm-offsets.h>
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#include <asm/hardware/cache-l2x0.h>
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.section ".text.head", "ax"
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#ifdef CONFIG_SMP
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ENTRY(v7_secondary_startup)
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bl v7_invalidate_l1
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b secondary_startup
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ENDPROC(v7_secondary_startup)
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#endif
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#ifdef CONFIG_PM
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/*
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* The following code must assume it is running from physical address
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* where absolute virtual addresses to the data section have to be
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* turned into relative ones.
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*/
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#ifdef CONFIG_CACHE_L2X0
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.macro pl310_resume
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adr r0, l2x0_saved_regs_offset
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ldr r2, [r0]
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add r2, r2, r0
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ldr r0, [r2, #L2X0_R_PHY_BASE] @ get physical base of l2x0
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ldr r1, [r2, #L2X0_R_AUX_CTRL] @ get aux_ctrl value
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str r1, [r0, #L2X0_AUX_CTRL] @ restore aux_ctrl
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mov r1, #0x1
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str r1, [r0, #L2X0_CTRL] @ re-enable L2
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.endm
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l2x0_saved_regs_offset:
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.word l2x0_saved_regs - .
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#else
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.macro pl310_resume
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.endm
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#endif
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ENTRY(v7_cpu_resume)
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bl v7_invalidate_l1
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pl310_resume
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b cpu_resume
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ENDPROC(v7_cpu_resume)
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#endif
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