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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/alpha/boot/main.c
downloadlinux-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/alpha/boot/main.c')
-rw-r--r--arch/alpha/boot/main.c190
1 files changed, 190 insertions, 0 deletions
diff --git a/arch/alpha/boot/main.c b/arch/alpha/boot/main.c
new file mode 100644
index 000000000..22a1cb026
--- /dev/null
+++ b/arch/alpha/boot/main.c
@@ -0,0 +1,190 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * arch/alpha/boot/main.c
+ *
+ * Copyright (C) 1994, 1995 Linus Torvalds
+ *
+ * This file is the bootloader for the Linux/AXP kernel
+ */
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <generated/utsrelease.h>
+#include <linux/mm.h>
+
+#include <asm/console.h>
+#include <asm/hwrpb.h>
+
+#include <linux/stdarg.h>
+
+#include "ksize.h"
+
+extern unsigned long switch_to_osf_pal(unsigned long nr,
+ struct pcb_struct * pcb_va, struct pcb_struct * pcb_pa,
+ unsigned long *vptb);
+struct hwrpb_struct *hwrpb = INIT_HWRPB;
+static struct pcb_struct pcb_va[1];
+
+/*
+ * Find a physical address of a virtual object..
+ *
+ * This is easy using the virtual page table address.
+ */
+
+static inline void *
+find_pa(unsigned long *vptb, void *ptr)
+{
+ unsigned long address = (unsigned long) ptr;
+ unsigned long result;
+
+ result = vptb[address >> 13];
+ result >>= 32;
+ result <<= 13;
+ result |= address & 0x1fff;
+ return (void *) result;
+}
+
+/*
+ * This function moves into OSF/1 pal-code, and has a temporary
+ * PCB for that. The kernel proper should replace this PCB with
+ * the real one as soon as possible.
+ *
+ * The page table muckery in here depends on the fact that the boot
+ * code has the L1 page table identity-map itself in the second PTE
+ * in the L1 page table. Thus the L1-page is virtually addressable
+ * itself (through three levels) at virtual address 0x200802000.
+ */
+
+#define VPTB ((unsigned long *) 0x200000000)
+#define L1 ((unsigned long *) 0x200802000)
+
+void
+pal_init(void)
+{
+ unsigned long i, rev;
+ struct percpu_struct * percpu;
+ struct pcb_struct * pcb_pa;
+
+ /* Create the dummy PCB. */
+ pcb_va->ksp = 0;
+ pcb_va->usp = 0;
+ pcb_va->ptbr = L1[1] >> 32;
+ pcb_va->asn = 0;
+ pcb_va->pcc = 0;
+ pcb_va->unique = 0;
+ pcb_va->flags = 1;
+ pcb_va->res1 = 0;
+ pcb_va->res2 = 0;
+ pcb_pa = find_pa(VPTB, pcb_va);
+
+ /*
+ * a0 = 2 (OSF)
+ * a1 = return address, but we give the asm the vaddr of the PCB
+ * a2 = physical addr of PCB
+ * a3 = new virtual page table pointer
+ * a4 = KSP (but the asm sets it)
+ */
+ srm_printk("Switching to OSF PAL-code .. ");
+
+ i = switch_to_osf_pal(2, pcb_va, pcb_pa, VPTB);
+ if (i) {
+ srm_printk("failed, code %ld\n", i);
+ __halt();
+ }
+
+ percpu = (struct percpu_struct *)
+ (INIT_HWRPB->processor_offset + (unsigned long) INIT_HWRPB);
+ rev = percpu->pal_revision = percpu->palcode_avail[2];
+
+ srm_printk("Ok (rev %lx)\n", rev);
+
+ tbia(); /* do it directly in case we are SMP */
+}
+
+static inline long openboot(void)
+{
+ char bootdev[256];
+ long result;
+
+ result = callback_getenv(ENV_BOOTED_DEV, bootdev, 255);
+ if (result < 0)
+ return result;
+ return callback_open(bootdev, result & 255);
+}
+
+static inline long close(long dev)
+{
+ return callback_close(dev);
+}
+
+static inline long load(long dev, unsigned long addr, unsigned long count)
+{
+ char bootfile[256];
+ extern char _end;
+ long result, boot_size = &_end - (char *) BOOT_ADDR;
+
+ result = callback_getenv(ENV_BOOTED_FILE, bootfile, 255);
+ if (result < 0)
+ return result;
+ result &= 255;
+ bootfile[result] = '\0';
+ if (result)
+ srm_printk("Boot file specification (%s) not implemented\n",
+ bootfile);
+ return callback_read(dev, count, (void *)addr, boot_size/512 + 1);
+}
+
+/*
+ * Start the kernel.
+ */
+static void runkernel(void)
+{
+ __asm__ __volatile__(
+ "bis %1,%1,$30\n\t"
+ "bis %0,%0,$26\n\t"
+ "ret ($26)"
+ : /* no outputs: it doesn't even return */
+ : "r" (START_ADDR),
+ "r" (PAGE_SIZE + INIT_STACK));
+}
+
+void start_kernel(void)
+{
+ long i;
+ long dev;
+ int nbytes;
+ char envval[256];
+
+ srm_printk("Linux/AXP bootloader for Linux " UTS_RELEASE "\n");
+ if (INIT_HWRPB->pagesize != 8192) {
+ srm_printk("Expected 8kB pages, got %ldkB\n", INIT_HWRPB->pagesize >> 10);
+ return;
+ }
+ pal_init();
+ dev = openboot();
+ if (dev < 0) {
+ srm_printk("Unable to open boot device: %016lx\n", dev);
+ return;
+ }
+ dev &= 0xffffffff;
+ srm_printk("Loading vmlinux ...");
+ i = load(dev, START_ADDR, KERNEL_SIZE);
+ close(dev);
+ if (i != KERNEL_SIZE) {
+ srm_printk("Failed (%lx)\n", i);
+ return;
+ }
+
+ nbytes = callback_getenv(ENV_BOOTED_OSFLAGS, envval, sizeof(envval));
+ if (nbytes < 0) {
+ nbytes = 0;
+ }
+ envval[nbytes] = '\0';
+ strcpy((char*)ZERO_PGE, envval);
+
+ srm_printk(" Ok\nNow booting the kernel\n");
+ runkernel();
+ for (i = 0 ; i < 0x100000000 ; i++)
+ /* nothing */;
+ __halt();
+}