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f7354ccac8
Now that thread_info is similar to task_struct, its address is in r2 so CURRENT_THREAD_INFO() macro is useless. This patch removes it. This patch also moves the 'tovirt(r2, r2)' down just before the reactivation of MMU translation, so that we keep the physical address of 'current' in r2 until then. It avoids a few calls to tophys(). At the same time, as the 'cpu' field is not anymore in thread_info, TI_CPU is renamed TASK_CPU by this patch. It also allows to get rid of a couple of '#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE' as ACCOUNT_CPU_USER_ENTRY() and ACCOUNT_CPU_USER_EXIT() are empty when CONFIG_VIRT_CPU_ACCOUNTING_NATIVE is not defined. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> [mpe: Fix a missed conversion of TI_CPU idle_6xx.S] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
57 lines
1.3 KiB
ArmAsm
57 lines
1.3 KiB
ArmAsm
/*
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* Copyright (C) 2012 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/threads.h>
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#include <asm/epapr_hcalls.h>
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#include <asm/reg.h>
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#include <asm/page.h>
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#include <asm/cputable.h>
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#include <asm/thread_info.h>
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#include <asm/ppc_asm.h>
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#include <asm/asm-compat.h>
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#include <asm/asm-offsets.h>
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#include <asm/export.h>
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#ifndef CONFIG_PPC64
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/* epapr_ev_idle() was derived from e500_idle() */
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_GLOBAL(epapr_ev_idle)
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PPC_LL r4, TI_LOCAL_FLAGS(r2) /* set napping bit */
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ori r4, r4,_TLF_NAPPING /* so when we take an exception */
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PPC_STL r4, TI_LOCAL_FLAGS(r2) /* it will return to our caller */
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wrteei 1
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idle_loop:
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LOAD_REG_IMMEDIATE(r11, EV_HCALL_TOKEN(EV_IDLE))
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.global epapr_ev_idle_start
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epapr_ev_idle_start:
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li r3, -1
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nop
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nop
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nop
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/*
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* Guard against spurious wakeups from a hypervisor --
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* only interrupt will cause us to return to LR due to
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* _TLF_NAPPING.
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*/
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b idle_loop
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#endif
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/* Hypercall entry point. Will be patched with device tree instructions. */
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.global epapr_hypercall_start
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epapr_hypercall_start:
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li r3, -1
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nop
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nop
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nop
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blr
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EXPORT_SYMBOL(epapr_hypercall_start)
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