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authorLinus Torvalds <torvalds@linux-foundation.org>2026-08-19 10:09:22 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2026-08-19 10:09:22 -0700
commitf4cdf7ca9a1fdcca413157df19753f388a5a224e (patch)
tree60a31895b2446cd7fa27514e8c2843534a0de0da /arch/m68k/coldfire/entry.S
downloadlinux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.tar.gz
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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.S198
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
+