Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 49f3bfe9 authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: Setup boot CPU VBR early to enable early page faults. 



vmemmap and the vmsplit code amongst others need to be able to take page
faults much earlier than trap_init() time, so move this in to the early
CPU initialization. VBR setup for secondary CPUs is already handled
through start_secondary(), so we only need to do this for the boot CPU.

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 1d5cfcdf

arch/sh/kernel/cpu/init.c

+17 −4
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ 
#include <asm/elf.h>

#include <asm/io.h>

#include <asm/smp.h>

#include <asm/sh_bios.h>



#ifdef CONFIG_SH_FPU

#define cpu_has_fpu	1
@@ -342,9 +343,21 @@ asmlinkage void __init sh_cpu_init(void) 
	speculative_execution_init();

	expmask_init();



	/* Do the rest of the boot processor setup */

	if (raw_smp_processor_id() == 0) {

		/* Save off the BIOS VBR, if there is one */

		sh_bios_vbr_init();



		/*

		 * Setup VBR for boot CPU. Secondary CPUs do this through

		 * start_secondary().

		 */

		per_cpu_trap_init();



		/*

	 * Boot processor to setup the FP and extended state context info.

		 * Boot processor to setup the FP and extended state

		 * context info.

		 */

	if (raw_smp_processor_id() == 0)

		init_thread_xstate();

	}

}

arch/sh/kernel/traps_32.c

+0 −7
Original line number Diff line number Diff line
@@ -30,7 +30,6 @@ 
#include <asm/alignment.h>

#include <asm/fpu.h>

#include <asm/kprobes.h>

#include <asm/sh_bios.h>



#ifdef CONFIG_CPU_SH2

# define TRAP_RESERVED_INST	4
@@ -848,12 +847,6 @@ void __init trap_init(void) 
#ifdef TRAP_UBC

	set_exception_table_vec(TRAP_UBC, breakpoint_trap_handler);

#endif



	/* Save off the BIOS VBR, if there is one */

	sh_bios_vbr_init();



	/* Setup VBR for boot cpu */

	per_cpu_trap_init();

}



void show_stack(struct task_struct *tsk, unsigned long *sp)