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0c3beacf68
Several architectures support text patching, but they name the header files that declare patching functions differently. Make all such headers consistently named text-patching.h and add an empty header in asm-generic for architectures that do not support text patching. Link: https://lkml.kernel.org/r/20241023162711.2579610-4-rppt@kernel.org Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> # m68k Acked-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Tested-by: kdevops <kdevops@lists.linux.dev> Cc: Andreas Larsson <andreas@gaisler.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Borislav Petkov (AMD) <bp@alien8.de> Cc: Brian Cain <bcain@quicinc.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Dinh Nguyen <dinguyen@kernel.org> Cc: Guo Ren <guoren@kernel.org> Cc: Helge Deller <deller@gmx.de> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Kent Overstreet <kent.overstreet@linux.dev> Cc: Liam R. Howlett <Liam.Howlett@Oracle.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Masami Hiramatsu (Google) <mhiramat@kernel.org> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Richard Weinberger <richard@nod.at> Cc: Russell King <linux@armlinux.org.uk> Cc: Song Liu <song@kernel.org> Cc: Stafford Horne <shorne@gmail.com> Cc: Steven Rostedt (Google) <rostedt@goodmis.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Uladzislau Rezki (Sony) <urezki@gmail.com> Cc: Vineet Gupta <vgupta@kernel.org> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
118 lines
2.4 KiB
C
118 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Author: Xianghua Xiao <x.xiao@freescale.com>
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* Zhang Wei <wei.zhang@freescale.com>
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*
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* Copyright 2006 Freescale Semiconductor Inc.
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*/
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#include <linux/stddef.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/pgtable.h>
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#include <asm/text-patching.h>
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#include <asm/page.h>
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#include <asm/pci-bridge.h>
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#include <asm/mpic.h>
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#include <asm/cacheflush.h>
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#include <asm/inst.h>
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#include <sysdev/fsl_soc.h>
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#include "mpc86xx.h"
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extern void __secondary_start_mpc86xx(void);
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#define MCM_PORT_CONFIG_OFFSET 0x10
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/* Offset from CCSRBAR */
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#define MPC86xx_MCM_OFFSET (0x1000)
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#define MPC86xx_MCM_SIZE (0x1000)
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static void __init
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smp_86xx_release_core(int nr)
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{
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__be32 __iomem *mcm_vaddr;
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unsigned long pcr;
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if (nr < 0 || nr >= NR_CPUS)
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return;
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/*
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* Startup Core #nr.
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*/
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mcm_vaddr = ioremap(get_immrbase() + MPC86xx_MCM_OFFSET,
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MPC86xx_MCM_SIZE);
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pcr = in_be32(mcm_vaddr + (MCM_PORT_CONFIG_OFFSET >> 2));
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pcr |= 1 << (nr + 24);
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out_be32(mcm_vaddr + (MCM_PORT_CONFIG_OFFSET >> 2), pcr);
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iounmap(mcm_vaddr);
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}
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static int __init
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smp_86xx_kick_cpu(int nr)
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{
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unsigned int save_vector;
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unsigned long target, flags;
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int n = 0;
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unsigned int *vector = (unsigned int *)(KERNELBASE + 0x100);
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if (nr < 0 || nr >= NR_CPUS)
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return -ENOENT;
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pr_debug("smp_86xx_kick_cpu: kick CPU #%d\n", nr);
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local_irq_save(flags);
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/* Save reset vector */
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save_vector = *vector;
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/* Setup fake reset vector to call __secondary_start_mpc86xx. */
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target = (unsigned long) __secondary_start_mpc86xx;
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patch_branch(vector, target, BRANCH_SET_LINK);
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/* Kick that CPU */
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smp_86xx_release_core(nr);
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/* Wait a bit for the CPU to take the exception. */
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while ((__secondary_hold_acknowledge != nr) && (n++, n < 1000))
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mdelay(1);
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/* Restore the exception vector */
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patch_instruction(vector, ppc_inst(save_vector));
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local_irq_restore(flags);
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pr_debug("wait CPU #%d for %d msecs.\n", nr, n);
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return 0;
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}
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static void __init
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smp_86xx_setup_cpu(int cpu_nr)
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{
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mpic_setup_this_cpu();
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}
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struct smp_ops_t smp_86xx_ops = {
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.cause_nmi_ipi = NULL,
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.message_pass = smp_mpic_message_pass,
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.probe = smp_mpic_probe,
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.kick_cpu = smp_86xx_kick_cpu,
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.setup_cpu = smp_86xx_setup_cpu,
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.take_timebase = smp_generic_take_timebase,
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.give_timebase = smp_generic_give_timebase,
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};
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void __init
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mpc86xx_smp_init(void)
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{
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smp_ops = &smp_86xx_ops;
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}
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