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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-19 10:09:22 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-19 10:09:22 -0700 |
| commit | f4cdf7ca9a1fdcca413157df19753f388a5a224e (patch) | |
| tree | 60a31895b2446cd7fa27514e8c2843534a0de0da /arch/m68k/coldfire/entry.S | |
| download | linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.tar.gz linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.zip | |
Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-mediagrafted
Pull media updates from Mauro Carvalho Chehab:
- v4l2-core: added ISP statistics support and per-block validation
- v4l2-core: Allow unknown HDR10 white point and luminance
- New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor
- New codec: Milos: VPU v2.0 codec support
- isp driver: gained support for Dreamchip RPPX1 ISP framework
- vsp1 driver: gained support for RZ/T2H and RZ/N2H
- Novalake driver: gained CVS support for new NVL hardware
- dvb-core: fix feed leak on failed DMX_ADD_PID
- several driver fixes, cleanups and minor improvements
* tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits)
media: ipu-bridge: check all DMI entries when overriding sensor rotation
media: v4l2-async: avoid deleting unlinked ASC entry on link error
media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement
media: intel/ipu6: fix async notifier cleanup leak on parse error
media: staging/ipu7: fix async notifier UAF on probe error path
media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path
media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem()
media: rcar-isp: Fix VSPX reference leaks
media: rcar-isp: Release ISPCORE resources
media: i2c: imx415: Release runtime PM reference on VBLANK error
media: i2c: imx415: Return test pattern write errors
media: renesas: vsp1: Declare index variables in for loop statement
media: renesas: vsp1: Make reset control optional to support platforms without a reset line
media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs
media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs
media: nxp: imx8-isi: Add additional 32-bit RGB format support
media: nxp: imx8-isi: Add 16-bit raw Bayer format support
media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams
media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks
media: nxp: imx8-isi: Correct color map between V4L2 and ISI
...
Diffstat (limited to 'arch/m68k/coldfire/entry.S')
| -rw-r--r-- | arch/m68k/coldfire/entry.S | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/arch/m68k/coldfire/entry.S b/arch/m68k/coldfire/entry.S new file mode 100644 index 000000000..4ea08336e --- /dev/null +++ b/arch/m68k/coldfire/entry.S @@ -0,0 +1,198 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later + * + * entry.S -- interrupt and exception processing for ColdFire + * + * Copyright (C) 1999-2007, Greg Ungerer (gerg@snapgear.com) + * Copyright (C) 1998 D. Jeff Dionne <jeff@lineo.ca>, + * Kenneth Albanowski <kjahds@kjahds.com>, + * Copyright (C) 2000 Lineo Inc. (www.lineo.com) + * Copyright (C) 2004-2006 Macq Electronique SA. (www.macqel.com) + * + * Based on: + * + * linux/arch/m68k/kernel/entry.S + * + * Copyright (C) 1991, 1992 Linus Torvalds + * + * Linux/m68k support by Hamish Macdonald + * + * 68060 fixes by Jesper Skov + * ColdFire support by Greg Ungerer (gerg@snapgear.com) + * 5307 fixes by David W. Miller + * linux 2.4 support David McCullough <davidm@snapgear.com> + * Bug, speed and maintainability fixes by Philippe De Muyter <phdm@macqel.be> + */ + +#include <linux/linkage.h> +#include <asm/unistd.h> +#include <asm/thread_info.h> +#include <asm/errno.h> +#include <asm/setup.h> +#include <asm/asm-offsets.h> +#include <asm/entry.h> + +#ifdef CONFIG_COLDFIRE_SW_A7 +/* + * Define software copies of the supervisor and user stack pointers. + */ +.bss +sw_ksp: +.long 0 +sw_usp: +.long 0 +#endif /* CONFIG_COLDFIRE_SW_A7 */ + +.text + +.globl system_call +.globl resume +.globl ret_from_exception +.globl sys_call_table +.globl inthandler + +enosys: + mov.l #sys_ni_syscall,%d3 + bra 1f + +ENTRY(system_call) + SAVE_ALL_SYS + move #0x2000,%sr /* enable intrs again */ + GET_CURRENT(%d2) + + cmpl #NR_syscalls,%d0 + jcc enosys + lea sys_call_table,%a0 + lsll #2,%d0 /* movel %a0@(%d0:l:4),%d3 */ + movel %a0@(%d0),%d3 + jeq enosys + +1: + movel %sp,%d2 /* get thread_info pointer */ + andl #-THREAD_SIZE,%d2 /* at start of kernel stack */ + movel %d2,%a0 + movel %a0@,%a1 /* save top of frame */ + movel %sp,%a1@(TASK_THREAD+THREAD_ESP0) + btst #(TIF_SYSCALL_TRACE%8),%a0@(TINFO_FLAGS+(31-TIF_SYSCALL_TRACE)/8) + bnes 1f + + movel %d3,%a0 + jbsr %a0@ + movel %d0,%sp@(PT_OFF_D0) /* save the return value */ + jra ret_from_exception +1: + movel #-ENOSYS,%d2 /* strace needs -ENOSYS in PT_OFF_D0 */ + movel %d2,PT_OFF_D0(%sp) /* on syscall entry */ + subql #4,%sp + SAVE_SWITCH_STACK + jbsr syscall_trace_enter + RESTORE_SWITCH_STACK + addql #4,%sp + addql #1,%d0 + jeq ret_from_exception + movel %d3,%a0 + jbsr %a0@ + movel %d0,%sp@(PT_OFF_D0) /* save the return value */ + subql #4,%sp /* dummy return address */ + SAVE_SWITCH_STACK + jbsr syscall_trace_leave + RESTORE_SWITCH_STACK + addql #4,%sp + +ret_from_exception: + move #0x2700,%sr /* disable intrs */ + btst #5,%sp@(PT_OFF_SR) /* check if returning to kernel */ + jeq Luser_return /* if so, skip resched, signals */ + +#ifdef CONFIG_PREEMPTION + movel %sp,%d1 /* get thread_info pointer */ + andl #-THREAD_SIZE,%d1 /* at base of kernel stack */ + movel %d1,%a0 + movel %a0@(TINFO_FLAGS),%d1 /* get thread_info->flags */ + andl #(1<<TIF_NEED_RESCHED),%d1 + jeq Lkernel_return + + movel %a0@(TINFO_PREEMPT),%d1 + cmpl #0,%d1 + jne Lkernel_return + + pea Lkernel_return + jmp preempt_schedule_irq /* preempt the kernel */ +#endif + +Lkernel_return: + moveml %sp@,%d1-%d5/%a0-%a2 + lea %sp@(32),%sp /* space for 8 regs */ + movel %sp@+,%d0 + addql #4,%sp /* orig d0 */ + addl %sp@+,%sp /* stk adj */ + rte + +Luser_return: + movel %sp,%d1 /* get thread_info pointer */ + andl #-THREAD_SIZE,%d1 /* at base of kernel stack */ + movel %d1,%a0 + moveb %a0@(TINFO_FLAGS+3),%d1 /* thread_info->flags (low 8 bits) */ + jne Lwork_to_do /* still work to do */ + +Lreturn: + RESTORE_USER + +Lwork_to_do: + movel %a0@(TINFO_FLAGS),%d1 /* get thread_info->flags */ + move #0x2000,%sr /* enable intrs again */ + btst #TIF_NEED_RESCHED,%d1 + jne reschedule + +Lsignal_return: + subql #4,%sp /* dummy return address */ + SAVE_SWITCH_STACK + pea %sp@(SWITCH_STACK_SIZE) + jsr do_notify_resume + addql #4,%sp + RESTORE_SWITCH_STACK + addql #4,%sp + jmp Luser_return + +/* + * This is the generic interrupt handler (for all hardware interrupt + * sources). Calls up to high level code to do all the work. + */ +ENTRY(inthandler) + SAVE_ALL_INT + GET_CURRENT(%d2) + + movew %sp@(PT_OFF_FORMATVEC),%d0 /* put exception # in d0 */ + andl #0x03fc,%d0 /* mask out vector only */ + + movel %sp,%sp@- /* push regs arg */ + lsrl #2,%d0 /* calculate real vector # */ + movel %d0,%sp@- /* push vector number */ + jbsr do_IRQ /* call high level irq handler */ + lea %sp@(8),%sp /* pop args off stack */ + + bra ret_from_exception + +/* + * Beware - when entering resume, prev (the current task) is + * in a0, next (the new task) is in a1, so don't change these + * registers until their contents are no longer needed. + */ +ENTRY(resume) + movew %sr,%d1 /* save current status */ + movew %d1,%a0@(TASK_THREAD+THREAD_SR) + movel %a0,%d1 /* get prev thread in d1 */ + SAVE_SWITCH_STACK + movel %sp,%a0@(TASK_THREAD+THREAD_KSP) /* save kernel stack pointer */ + RDUSP /* movel %usp,%a3 */ + movel %a3,%a0@(TASK_THREAD+THREAD_USP) /* save thread user stack */ +#ifdef CONFIG_MMU + movel %a1,%a2 /* set new current */ +#endif + movel %a1@(TASK_THREAD+THREAD_USP),%a3 /* restore thread user stack */ + WRUSP /* movel %a3,%usp */ + movel %a1@(TASK_THREAD+THREAD_KSP),%sp /* restore new kernel stack */ + movew %a1@(TASK_THREAD+THREAD_SR),%d7 /* restore new status */ + movew %d7,%sr + RESTORE_SWITCH_STACK + rts + |
