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-rw-r--r--arch/s390/boot/.gitignore2
-rw-r--r--arch/s390/boot/Makefile55
-rw-r--r--arch/s390/boot/als.c126
-rw-r--r--arch/s390/boot/compressed/.gitignore5
-rw-r--r--arch/s390/boot/compressed/Makefile74
-rw-r--r--arch/s390/boot/compressed/head.S52
-rw-r--r--arch/s390/boot/compressed/misc.c116
-rw-r--r--arch/s390/boot/compressed/vmlinux.lds.S65
-rw-r--r--arch/s390/boot/compressed/vmlinux.scr.lds.S15
-rw-r--r--arch/s390/boot/ebcdic.c2
-rw-r--r--arch/s390/boot/head.S340
-rw-r--r--arch/s390/boot/head_kdump.S101
-rw-r--r--arch/s390/boot/install.sh35
-rw-r--r--arch/s390/boot/mem.S2
-rw-r--r--arch/s390/boot/sclp_early_core.c2
15 files changed, 992 insertions, 0 deletions
diff --git a/arch/s390/boot/.gitignore b/arch/s390/boot/.gitignore
new file mode 100644
index 000000000..017d5912a
--- /dev/null
+++ b/arch/s390/boot/.gitignore
@@ -0,0 +1,2 @@
+image
+bzImage
diff --git a/arch/s390/boot/Makefile b/arch/s390/boot/Makefile
new file mode 100644
index 000000000..45c72d1f9
--- /dev/null
+++ b/arch/s390/boot/Makefile
@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the linux s390-specific parts of the memory manager.
+#
+
+KCOV_INSTRUMENT := n
+GCOV_PROFILE := n
+UBSAN_SANITIZE := n
+KASAN_SANITIZE := n
+
+KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR)
+KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR)
+
+#
+# Use -march=z900 for als.c to be able to print an error
+# message if the kernel is started on a machine which is too old
+#
+ifneq ($(CC_FLAGS_MARCH),-march=z900)
+AFLAGS_REMOVE_head.o += $(CC_FLAGS_MARCH)
+AFLAGS_head.o += -march=z900
+AFLAGS_REMOVE_mem.o += $(CC_FLAGS_MARCH)
+AFLAGS_mem.o += -march=z900
+CFLAGS_REMOVE_als.o += $(CC_FLAGS_MARCH)
+CFLAGS_als.o += -march=z900
+CFLAGS_REMOVE_sclp_early_core.o += $(CC_FLAGS_MARCH)
+CFLAGS_sclp_early_core.o += -march=z900
+endif
+
+CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char
+
+obj-y := head.o als.o ebcdic.o sclp_early_core.o mem.o
+targets := bzImage startup.a $(obj-y)
+subdir- := compressed
+
+OBJECTS := $(addprefix $(obj)/,$(obj-y))
+
+$(obj)/bzImage: $(obj)/compressed/vmlinux FORCE
+ $(call if_changed,objcopy)
+
+$(obj)/compressed/vmlinux: $(obj)/startup.a FORCE
+ $(Q)$(MAKE) $(build)=$(obj)/compressed $@
+
+quiet_cmd_ar = AR $@
+ cmd_ar = rm -f $@; $(AR) rcsTP$(KBUILD_ARFLAGS) $@ $(filter $(OBJECTS), $^)
+
+$(obj)/startup.a: $(OBJECTS) FORCE
+ $(call if_changed,ar)
+
+install:
+ sh -x $(srctree)/$(obj)/install.sh $(KERNELRELEASE) $(obj)/bzImage \
+ System.map "$(INSTALL_PATH)"
+
+chkbss := $(OBJECTS)
+chkbss-target := $(obj)/startup.a
+include $(srctree)/arch/s390/scripts/Makefile.chkbss
diff --git a/arch/s390/boot/als.c b/arch/s390/boot/als.c
new file mode 100644
index 000000000..d592e0d90
--- /dev/null
+++ b/arch/s390/boot/als.c
@@ -0,0 +1,126 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright IBM Corp. 2016
+ */
+#include <linux/kernel.h>
+#include <asm/processor.h>
+#include <asm/facility.h>
+#include <asm/lowcore.h>
+#include <asm/sclp.h>
+
+/*
+ * The code within this file will be called very early. It may _not_
+ * access anything within the bss section, since that is not cleared
+ * yet and may contain data (e.g. initrd) that must be saved by other
+ * code.
+ * For temporary objects the stack (16k) should be used.
+ */
+
+static unsigned long als[] = { FACILITIES_ALS };
+
+static void u16_to_hex(char *str, u16 val)
+{
+ int i, num;
+
+ for (i = 1; i <= 4; i++) {
+ num = (val >> (16 - 4 * i)) & 0xf;
+ if (num >= 10)
+ num += 7;
+ *str++ = '0' + num;
+ }
+ *str = '\0';
+}
+
+static void print_machine_type(void)
+{
+ static char mach_str[80] = "Detected machine-type number: ";
+ char type_str[5];
+ struct cpuid id;
+
+ get_cpu_id(&id);
+ u16_to_hex(type_str, id.machine);
+ strcat(mach_str, type_str);
+ strcat(mach_str, "\n");
+ sclp_early_printk(mach_str);
+}
+
+static void u16_to_decimal(char *str, u16 val)
+{
+ int div = 1;
+
+ while (div * 10 <= val)
+ div *= 10;
+ while (div) {
+ *str++ = '0' + val / div;
+ val %= div;
+ div /= 10;
+ }
+ *str = '\0';
+}
+
+static void print_missing_facilities(void)
+{
+ static char als_str[80] = "Missing facilities: ";
+ unsigned long val;
+ char val_str[6];
+ int i, j, first;
+
+ first = 1;
+ for (i = 0; i < ARRAY_SIZE(als); i++) {
+ val = ~S390_lowcore.stfle_fac_list[i] & als[i];
+ for (j = 0; j < BITS_PER_LONG; j++) {
+ if (!(val & (1UL << (BITS_PER_LONG - 1 - j))))
+ continue;
+ if (!first)
+ strcat(als_str, ",");
+ /*
+ * Make sure we stay within one line. Consider that
+ * each facility bit adds up to five characters and
+ * z/VM adds a four character prefix.
+ */
+ if (strlen(als_str) > 70) {
+ strcat(als_str, "\n");
+ sclp_early_printk(als_str);
+ *als_str = '\0';
+ }
+ u16_to_decimal(val_str, i * BITS_PER_LONG + j);
+ strcat(als_str, val_str);
+ first = 0;
+ }
+ }
+ strcat(als_str, "\n");
+ sclp_early_printk(als_str);
+ sclp_early_printk("See Principles of Operations for facility bits\n");
+}
+
+static void facility_mismatch(void)
+{
+ sclp_early_printk("The Linux kernel requires more recent processor hardware\n");
+ print_machine_type();
+ print_missing_facilities();
+ disabled_wait(0x8badcccc);
+}
+
+void verify_facilities(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(S390_lowcore.stfle_fac_list); i++)
+ S390_lowcore.stfle_fac_list[i] = 0;
+ asm volatile(
+ " stfl 0(0)\n"
+ : "=m" (S390_lowcore.stfl_fac_list));
+ S390_lowcore.stfle_fac_list[0] = (u64)S390_lowcore.stfl_fac_list << 32;
+ if (S390_lowcore.stfl_fac_list & 0x01000000) {
+ register unsigned long reg0 asm("0") = ARRAY_SIZE(als) - 1;
+
+ asm volatile(".insn s,0xb2b00000,0(%1)" /* stfle */
+ : "+d" (reg0)
+ : "a" (&S390_lowcore.stfle_fac_list)
+ : "memory", "cc");
+ }
+ for (i = 0; i < ARRAY_SIZE(als); i++) {
+ if ((S390_lowcore.stfle_fac_list[i] & als[i]) != als[i])
+ facility_mismatch();
+ }
+}
diff --git a/arch/s390/boot/compressed/.gitignore b/arch/s390/boot/compressed/.gitignore
new file mode 100644
index 000000000..45aeb4f08
--- /dev/null
+++ b/arch/s390/boot/compressed/.gitignore
@@ -0,0 +1,5 @@
+sizes.h
+vmlinux
+vmlinux.lds
+vmlinux.scr.lds
+vmlinux.bin.full
diff --git a/arch/s390/boot/compressed/Makefile b/arch/s390/boot/compressed/Makefile
new file mode 100644
index 000000000..9b3d821e5
--- /dev/null
+++ b/arch/s390/boot/compressed/Makefile
@@ -0,0 +1,74 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# linux/arch/s390/boot/compressed/Makefile
+#
+# create a compressed vmlinux image from the original vmlinux
+#
+
+KCOV_INSTRUMENT := n
+GCOV_PROFILE := n
+UBSAN_SANITIZE := n
+KASAN_SANITIZE := n
+
+obj-y := $(if $(CONFIG_KERNEL_UNCOMPRESSED),,head.o misc.o) piggy.o
+targets := vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2
+targets += vmlinux.bin.xz vmlinux.bin.lzma vmlinux.bin.lzo vmlinux.bin.lz4
+targets += vmlinux.scr.lds $(obj-y) $(if $(CONFIG_KERNEL_UNCOMPRESSED),,sizes.h)
+
+KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR)
+KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR)
+
+OBJECTS := $(addprefix $(obj)/,$(obj-y))
+
+LDFLAGS_vmlinux := --oformat $(LD_BFD) -e startup -T
+$(obj)/vmlinux: $(obj)/vmlinux.lds $(objtree)/arch/s390/boot/startup.a $(OBJECTS) FORCE
+ $(call if_changed,ld)
+
+# extract required uncompressed vmlinux symbols and adjust them to reflect offsets inside vmlinux.bin
+sed-sizes := -e 's/^\([0-9a-fA-F]*\) . \(__bss_start\|_end\)$$/\#define SZ\2 (0x\1 - 0x100000)/p'
+
+quiet_cmd_sizes = GEN $@
+ cmd_sizes = $(NM) $< | sed -n $(sed-sizes) > $@
+
+$(obj)/sizes.h: vmlinux
+ $(call if_changed,sizes)
+
+AFLAGS_head.o += -I$(objtree)/$(obj)
+$(obj)/head.o: $(obj)/sizes.h
+
+CFLAGS_misc.o += -I$(objtree)/$(obj)
+$(obj)/misc.o: $(obj)/sizes.h
+
+OBJCOPYFLAGS_vmlinux.bin := -R .comment -S
+$(obj)/vmlinux.bin: vmlinux
+ $(call if_changed,objcopy)
+
+vmlinux.bin.all-y := $(obj)/vmlinux.bin
+
+suffix-$(CONFIG_KERNEL_GZIP) := .gz
+suffix-$(CONFIG_KERNEL_BZIP2) := .bz2
+suffix-$(CONFIG_KERNEL_LZ4) := .lz4
+suffix-$(CONFIG_KERNEL_LZMA) := .lzma
+suffix-$(CONFIG_KERNEL_LZO) := .lzo
+suffix-$(CONFIG_KERNEL_XZ) := .xz
+
+$(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE
+ $(call if_changed,gzip)
+$(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) FORCE
+ $(call if_changed,bzip2)
+$(obj)/vmlinux.bin.lz4: $(vmlinux.bin.all-y) FORCE
+ $(call if_changed,lz4)
+$(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE
+ $(call if_changed,lzma)
+$(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) FORCE
+ $(call if_changed,lzo)
+$(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y) FORCE
+ $(call if_changed,xzkern)
+
+LDFLAGS_piggy.o := -r --format binary --oformat $(LD_BFD) -T
+$(obj)/piggy.o: $(obj)/vmlinux.scr.lds $(obj)/vmlinux.bin$(suffix-y)
+ $(call if_changed,ld)
+
+chkbss := $(filter-out $(obj)/misc.o $(obj)/piggy.o,$(OBJECTS))
+chkbss-target := $(obj)/vmlinux.bin
+include $(srctree)/arch/s390/scripts/Makefile.chkbss
diff --git a/arch/s390/boot/compressed/head.S b/arch/s390/boot/compressed/head.S
new file mode 100644
index 000000000..df8dbbc17
--- /dev/null
+++ b/arch/s390/boot/compressed/head.S
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Startup glue code to uncompress the kernel
+ *
+ * Copyright IBM Corp. 2010
+ *
+ * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
+ */
+
+#include <linux/init.h>
+#include <linux/linkage.h>
+#include <asm/asm-offsets.h>
+#include <asm/thread_info.h>
+#include <asm/page.h>
+#include "sizes.h"
+
+__HEAD
+ENTRY(startup_decompressor)
+ basr %r13,0 # get base
+.LPG1:
+ # setup stack
+ lg %r15,.Lstack-.LPG1(%r13)
+ aghi %r15,-160
+ brasl %r14,decompress_kernel
+ # Set up registers for memory mover. We move the decompressed image to
+ # 0x100000, where startup_continue of the decompressed image is supposed
+ # to be.
+ lgr %r4,%r2
+ lg %r2,.Loffset-.LPG1(%r13)
+ lg %r3,.Lmvsize-.LPG1(%r13)
+ lgr %r5,%r3
+ # Move the memory mover someplace safe so it doesn't overwrite itself.
+ la %r1,0x200
+ mvc 0(mover_end-mover,%r1),mover-.LPG1(%r13)
+ # When the memory mover is done we pass control to
+ # arch/s390/kernel/head64.S:startup_continue which lives at 0x100000 in
+ # the decompressed image.
+ lgr %r6,%r2
+ br %r1
+mover:
+ mvcle %r2,%r4,0
+ jo mover
+ br %r6
+mover_end:
+
+ .align 8
+.Lstack:
+ .quad 0x8000 + (1<<(PAGE_SHIFT+THREAD_SIZE_ORDER))
+.Loffset:
+ .quad 0x100000
+.Lmvsize:
+ .quad SZ__bss_start
diff --git a/arch/s390/boot/compressed/misc.c b/arch/s390/boot/compressed/misc.c
new file mode 100644
index 000000000..f66ad73c2
--- /dev/null
+++ b/arch/s390/boot/compressed/misc.c
@@ -0,0 +1,116 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Definitions and wrapper functions for kernel decompressor
+ *
+ * Copyright IBM Corp. 2010
+ *
+ * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
+ */
+
+#include <linux/uaccess.h>
+#include <asm/page.h>
+#include <asm/sclp.h>
+#include <asm/ipl.h>
+#include "sizes.h"
+
+/*
+ * gzip declarations
+ */
+#define STATIC static
+
+#undef memset
+#undef memcpy
+#undef memmove
+#define memmove memmove
+#define memzero(s, n) memset((s), 0, (n))
+
+/* Symbols defined by linker scripts */
+extern char input_data[];
+extern int input_len;
+extern char _end[];
+extern char _bss[], _ebss[];
+
+static void error(char *m);
+
+static unsigned long free_mem_ptr;
+static unsigned long free_mem_end_ptr;
+
+#ifdef CONFIG_HAVE_KERNEL_BZIP2
+#define HEAP_SIZE 0x400000
+#else
+#define HEAP_SIZE 0x10000
+#endif
+
+#ifdef CONFIG_KERNEL_GZIP
+#include "../../../../lib/decompress_inflate.c"
+#endif
+
+#ifdef CONFIG_KERNEL_BZIP2
+#include "../../../../lib/decompress_bunzip2.c"
+#endif
+
+#ifdef CONFIG_KERNEL_LZ4
+#include "../../../../lib/decompress_unlz4.c"
+#endif
+
+#ifdef CONFIG_KERNEL_LZMA
+#include "../../../../lib/decompress_unlzma.c"
+#endif
+
+#ifdef CONFIG_KERNEL_LZO
+#include "../../../../lib/decompress_unlzo.c"
+#endif
+
+#ifdef CONFIG_KERNEL_XZ
+#include "../../../../lib/decompress_unxz.c"
+#endif
+
+static int puts(const char *s)
+{
+ sclp_early_printk(s);
+ return 0;
+}
+
+static void error(char *x)
+{
+ unsigned long long psw = 0x000a0000deadbeefULL;
+
+ puts("\n\n");
+ puts(x);
+ puts("\n\n -- System halted");
+
+ asm volatile("lpsw %0" : : "Q" (psw));
+}
+
+unsigned long decompress_kernel(void)
+{
+ void *output, *kernel_end;
+
+ output = (void *) ALIGN((unsigned long) _end + HEAP_SIZE, PAGE_SIZE);
+ kernel_end = output + SZ__bss_start;
+
+#ifdef CONFIG_BLK_DEV_INITRD
+ /*
+ * Move the initrd right behind the end of the decompressed
+ * kernel image. This also prevents initrd corruption caused by
+ * bss clearing since kernel_end will always be located behind the
+ * current bss section..
+ */
+ if (INITRD_START && INITRD_SIZE && kernel_end > (void *) INITRD_START) {
+ memmove(kernel_end, (void *) INITRD_START, INITRD_SIZE);
+ INITRD_START = (unsigned long) kernel_end;
+ }
+#endif
+
+ /*
+ * Clear bss section. free_mem_ptr and free_mem_end_ptr need to be
+ * initialized afterwards since they reside in bss.
+ */
+ memset(_bss, 0, _ebss - _bss);
+ free_mem_ptr = (unsigned long) _end;
+ free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
+
+ __decompress(input_data, input_len, NULL, NULL, output, 0, NULL, error);
+ return (unsigned long) output;
+}
+
diff --git a/arch/s390/boot/compressed/vmlinux.lds.S b/arch/s390/boot/compressed/vmlinux.lds.S
new file mode 100644
index 000000000..b16ac8b3c
--- /dev/null
+++ b/arch/s390/boot/compressed/vmlinux.lds.S
@@ -0,0 +1,65 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <asm-generic/vmlinux.lds.h>
+
+OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
+OUTPUT_ARCH(s390:64-bit)
+
+ENTRY(startup)
+
+SECTIONS
+{
+ /* Be careful parts of head_64.S assume startup_32 is at
+ * address 0.
+ */
+ . = 0;
+ .head.text : {
+ _head = . ;
+ HEAD_TEXT
+ _ehead = . ;
+ }
+ .text : {
+ _text = .; /* Text */
+ *(.text)
+ *(.text.*)
+ _etext = . ;
+ }
+ .rodata : {
+ _rodata = . ;
+ *(.rodata) /* read-only data */
+ *(EXCLUDE_FILE (*piggy.o) .rodata.compressed)
+ _erodata = . ;
+ }
+ .data : {
+ _data = . ;
+ *(.data)
+ *(.data.*)
+ _edata = . ;
+ }
+ startup_continue = 0x100000;
+#ifdef CONFIG_KERNEL_UNCOMPRESSED
+ . = 0x100000;
+#else
+ . = ALIGN(8);
+#endif
+ .rodata.compressed : {
+ *(.rodata.compressed)
+ }
+ . = ALIGN(256);
+ .bss : {
+ _bss = . ;
+ *(.bss)
+ *(.bss.*)
+ *(COMMON)
+ . = ALIGN(8); /* For convenience during zeroing */
+ _ebss = .;
+ }
+ _end = .;
+
+ /* Sections to be discarded */
+ /DISCARD/ : {
+ *(.eh_frame)
+ *(__ex_table)
+ *(*__ksymtab*)
+ *(___kcrctab*)
+ }
+}
diff --git a/arch/s390/boot/compressed/vmlinux.scr.lds.S b/arch/s390/boot/compressed/vmlinux.scr.lds.S
new file mode 100644
index 000000000..ff01d18c9
--- /dev/null
+++ b/arch/s390/boot/compressed/vmlinux.scr.lds.S
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+SECTIONS
+{
+ .rodata.compressed : {
+#ifndef CONFIG_KERNEL_UNCOMPRESSED
+ input_len = .;
+ LONG(input_data_end - input_data) input_data = .;
+#endif
+ *(.data)
+#ifndef CONFIG_KERNEL_UNCOMPRESSED
+ output_len = . - 4;
+ input_data_end = .;
+#endif
+ }
+}
diff --git a/arch/s390/boot/ebcdic.c b/arch/s390/boot/ebcdic.c
new file mode 100644
index 000000000..7391e7d36
--- /dev/null
+++ b/arch/s390/boot/ebcdic.c
@@ -0,0 +1,2 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "../kernel/ebcdic.c"
diff --git a/arch/s390/boot/head.S b/arch/s390/boot/head.S
new file mode 100644
index 000000000..f721913b7
--- /dev/null
+++ b/arch/s390/boot/head.S
@@ -0,0 +1,340 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright IBM Corp. 1999, 2010
+ *
+ * Author(s): Hartmut Penner <hp@de.ibm.com>
+ * Martin Schwidefsky <schwidefsky@de.ibm.com>
+ * Rob van der Heij <rvdhei@iae.nl>
+ * Heiko Carstens <heiko.carstens@de.ibm.com>
+ *
+ * There are 5 different IPL methods
+ * 1) load the image directly into ram at address 0 and do an PSW restart
+ * 2) linload will load the image from address 0x10000 to memory 0x10000
+ * and start the code thru LPSW 0x0008000080010000 (VM only, deprecated)
+ * 3) generate the tape ipl header, store the generated image on a tape
+ * and ipl from it
+ * In case of SL tape you need to IPL 5 times to get past VOL1 etc
+ * 4) generate the vm reader ipl header, move the generated image to the
+ * VM reader (use option NOH!) and do a ipl from reader (VM only)
+ * 5) direct call of start by the SALIPL loader
+ * We use the cpuid to distinguish between VM and native ipl
+ * params for kernel are pushed to 0x10400 (see setup.h)
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/linkage.h>
+#include <asm/asm-offsets.h>
+#include <asm/thread_info.h>
+#include <asm/page.h>
+#include <asm/ptrace.h>
+
+#define ARCH_OFFSET 4
+
+__HEAD
+
+#define IPL_BS 0x730
+ .org 0
+ .long 0x00080000,0x80000000+iplstart # The first 24 bytes are loaded
+ .long 0x02000018,0x60000050 # by ipl to addresses 0-23.
+ .long 0x02000068,0x60000050 # (a PSW and two CCWs).
+ .fill 80-24,1,0x40 # bytes 24-79 are discarded !!
+ .long 0x020000f0,0x60000050 # The next 160 byte are loaded
+ .long 0x02000140,0x60000050 # to addresses 0x18-0xb7
+ .long 0x02000190,0x60000050 # They form the continuation
+ .long 0x020001e0,0x60000050 # of the CCW program started
+ .long 0x02000230,0x60000050 # by ipl and load the range
+ .long 0x02000280,0x60000050 # 0x0f0-0x730 from the image
+ .long 0x020002d0,0x60000050 # to the range 0x0f0-0x730
+ .long 0x02000320,0x60000050 # in memory. At the end of
+ .long 0x02000370,0x60000050 # the channel program the PSW
+ .long 0x020003c0,0x60000050 # at location 0 is loaded.
+ .long 0x02000410,0x60000050 # Initial processing starts
+ .long 0x02000460,0x60000050 # at 0x200 = iplstart.
+ .long 0x020004b0,0x60000050
+ .long 0x02000500,0x60000050
+ .long 0x02000550,0x60000050
+ .long 0x020005a0,0x60000050
+ .long 0x020005f0,0x60000050
+ .long 0x02000640,0x60000050
+ .long 0x02000690,0x60000050
+ .long 0x020006e0,0x20000050
+
+ .org 0x200
+
+#
+# subroutine to wait for end I/O
+#
+.Lirqwait:
+ mvc __LC_IO_NEW_PSW(16),.Lnewpsw # set up IO interrupt psw
+ lpsw .Lwaitpsw
+.Lioint:
+ br %r14
+ .align 8
+.Lnewpsw:
+ .quad 0x0000000080000000,.Lioint
+.Lwaitpsw:
+ .long 0x020a0000,0x80000000+.Lioint
+
+#
+# subroutine for loading cards from the reader
+#
+.Lloader:
+ la %r4,0(%r14)
+ la %r3,.Lorb # r2 = address of orb into r2
+ la %r5,.Lirb # r4 = address of irb
+ la %r6,.Lccws
+ la %r7,20
+.Linit:
+ st %r2,4(%r6) # initialize CCW data addresses
+ la %r2,0x50(%r2)
+ la %r6,8(%r6)
+ bct 7,.Linit
+
+ lctl %c6,%c6,.Lcr6 # set IO subclass mask
+ slr %r2,%r2
+.Lldlp:
+ ssch 0(%r3) # load chunk of 1600 bytes
+ bnz .Llderr
+.Lwait4irq:
+ bas %r14,.Lirqwait
+ c %r1,__LC_SUBCHANNEL_ID # compare subchannel number
+ bne .Lwait4irq
+ tsch 0(%r5)
+
+ slr %r0,%r0
+ ic %r0,8(%r5) # get device status
+ chi %r0,8 # channel end ?
+ be .Lcont
+ chi %r0,12 # channel end + device end ?
+ be .Lcont
+
+ l %r0,4(%r5)
+ s %r0,8(%r3) # r0/8 = number of ccws executed
+ mhi %r0,10 # *10 = number of bytes in ccws
+ lh %r3,10(%r5) # get residual count
+ sr %r0,%r3 # #ccws*80-residual=#bytes read
+ ar %r2,%r0
+
+ br %r4 # r2 contains the total size
+
+.Lcont:
+ ahi %r2,0x640 # add 0x640 to total size
+ la %r6,.Lccws
+ la %r7,20
+.Lincr:
+ l %r0,4(%r6) # update CCW data addresses
+ ahi %r0,0x640
+ st %r0,4(%r6)
+ ahi %r6,8
+ bct 7,.Lincr
+
+ b .Lldlp
+.Llderr:
+ lpsw .Lcrash
+
+ .align 8
+.Lorb: .long 0x00000000,0x0080ff00,.Lccws
+.Lirb: .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+.Lcr6: .long 0xff000000
+.Lloadp:.long 0,0
+ .align 8
+.Lcrash:.long 0x000a0000,0x00000000
+
+ .align 8
+.Lccws: .rept 19
+ .long 0x02600050,0x00000000
+ .endr
+ .long 0x02200050,0x00000000
+
+iplstart:
+ mvi __LC_AR_MODE_ID,1 # set esame flag
+ slr %r0,%r0 # set cpuid to zero
+ lhi %r1,2 # mode 2 = esame (dump)
+ sigp %r1,%r0,0x12 # switch to esame mode
+ bras %r13,0f
+ .fill 16,4,0x0
+0: lmh %r0,%r15,0(%r13) # clear high-order half of gprs
+ sam31 # switch to 31 bit addressing mode
+ lh %r1,__LC_SUBCHANNEL_ID # test if subchannel number
+ bct %r1,.Lnoload # is valid
+ l %r1,__LC_SUBCHANNEL_ID # load ipl subchannel number
+ la %r2,IPL_BS # load start address
+ bas %r14,.Lloader # load rest of ipl image
+ l %r12,.Lparm # pointer to parameter area
+ st %r1,IPL_DEVICE+ARCH_OFFSET-PARMAREA(%r12) # save ipl device number
+
+#
+# load parameter file from ipl device
+#
+.Lagain1:
+ l %r2,.Linitrd # ramdisk loc. is temp
+ bas %r14,.Lloader # load parameter file
+ ltr %r2,%r2 # got anything ?
+ bz .Lnopf
+ chi %r2,895
+ bnh .Lnotrunc
+ la %r2,895
+.Lnotrunc:
+ l %r4,.Linitrd
+ clc 0(3,%r4),.L_hdr # if it is HDRx
+ bz .Lagain1 # skip dataset header
+ clc 0(3,%r4),.L_eof # if it is EOFx
+ bz .Lagain1 # skip dateset trailer
+ la %r5,0(%r4,%r2)
+ lr %r3,%r2
+ la %r3,COMMAND_LINE-PARMAREA(%r12) # load adr. of command line
+ mvc 0(256,%r3),0(%r4)
+ mvc 256(256,%r3),256(%r4)
+ mvc 512(256,%r3),512(%r4)
+ mvc 768(122,%r3),768(%r4)
+ slr %r0,%r0
+ b .Lcntlp
+.Ldelspc:
+ ic %r0,0(%r2,%r3)
+ chi %r0,0x20 # is it a space ?
+ be .Lcntlp
+ ahi %r2,1
+ b .Leolp
+.Lcntlp:
+ brct %r2,.Ldelspc
+.Leolp:
+ slr %r0,%r0
+ stc %r0,0(%r2,%r3) # terminate buffer
+.Lnopf:
+
+#
+# load ramdisk from ipl device
+#
+.Lagain2:
+ l %r2,.Linitrd # addr of ramdisk
+ st %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12)
+ bas %r14,.Lloader # load ramdisk
+ st %r2,INITRD_SIZE+ARCH_OFFSET-PARMAREA(%r12) # store size of rd
+ ltr %r2,%r2
+ bnz .Lrdcont
+ st %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # no ramdisk found
+.Lrdcont:
+ l %r2,.Linitrd
+
+ clc 0(3,%r2),.L_hdr # skip HDRx and EOFx
+ bz .Lagain2
+ clc 0(3,%r2),.L_eof
+ bz .Lagain2
+
+#
+# reset files in VM reader
+#
+ stidp .Lcpuid # store cpuid
+ tm .Lcpuid,0xff # running VM ?
+ bno .Lnoreset
+ la %r2,.Lreset
+ lhi %r3,26
+ diag %r2,%r3,8
+ la %r5,.Lirb
+ stsch 0(%r5) # check if irq is pending
+ tm 30(%r5),0x0f # by verifying if any of the
+ bnz .Lwaitforirq # activity or status control
+ tm 31(%r5),0xff # bits is set in the schib
+ bz .Lnoreset
+.Lwaitforirq:
+ bas %r14,.Lirqwait # wait for IO interrupt
+ c %r1,__LC_SUBCHANNEL_ID # compare subchannel number
+ bne .Lwaitforirq
+ la %r5,.Lirb
+ tsch 0(%r5)
+.Lnoreset:
+ b .Lnoload
+
+#
+# everything loaded, go for it
+#
+.Lnoload:
+ l %r1,.Lstartup
+ br %r1
+
+.Linitrd:.long _end # default address of initrd
+.Lparm: .long PARMAREA
+.Lstartup: .long startup
+.Lreset:.byte 0xc3,0xc8,0xc1,0xd5,0xc7,0xc5,0x40,0xd9,0xc4,0xd9,0x40
+ .byte 0xc1,0xd3,0xd3,0x40,0xd2,0xc5,0xc5,0xd7,0x40,0xd5,0xd6
+ .byte 0xc8,0xd6,0xd3,0xc4 # "change rdr all keep nohold"
+.L_eof: .long 0xc5d6c600 /* C'EOF' */
+.L_hdr: .long 0xc8c4d900 /* C'HDR' */
+ .align 8
+.Lcpuid:.fill 8,1,0
+
+#
+# startup-code at 0x10000, running in absolute addressing mode
+# this is called either by the ipl loader or directly by PSW restart
+# or linload or SALIPL
+#
+ .org 0x10000
+ENTRY(startup)
+ j .Lep_startup_normal
+ .org EP_OFFSET
+#
+# This is a list of s390 kernel entry points. At address 0x1000f the number of
+# valid entry points is stored.
+#
+# IMPORTANT: Do not change this table, it is s390 kernel ABI!
+#
+ .ascii EP_STRING
+ .byte 0x00,0x01
+#
+# kdump startup-code at 0x10010, running in 64 bit absolute addressing mode
+#
+ .org 0x10010
+ENTRY(startup_kdump)
+ j .Lep_startup_kdump
+.Lep_startup_normal:
+ mvi __LC_AR_MODE_ID,1 # set esame flag
+ slr %r0,%r0 # set cpuid to zero
+ lhi %r1,2 # mode 2 = esame (dump)
+ sigp %r1,%r0,0x12 # switch to esame mode
+ bras %r13,0f
+ .fill 16,4,0x0
+0: lmh %r0,%r15,0(%r13) # clear high-order half of gprs
+ sam64 # switch to 64 bit addressing mode
+ basr %r13,0 # get base
+.LPG0:
+ xc 0x200(256),0x200 # partially clear lowcore
+ xc 0x300(256),0x300
+ xc 0xe00(256),0xe00
+ xc 0xf00(256),0xf00
+ lctlg %c0,%c15,0x200(%r0) # initialize control registers
+ stcke __LC_BOOT_CLOCK
+ mvc __LC_LAST_UPDATE_CLOCK(8),__LC_BOOT_CLOCK+1
+ spt 6f-.LPG0(%r13)
+ mvc __LC_LAST_UPDATE_TIMER(8),6f-.LPG0(%r13)
+ l %r15,.Lstack-.LPG0(%r13)
+ ahi %r15,-STACK_FRAME_OVERHEAD
+ brasl %r14,verify_facilities
+#ifdef CONFIG_KERNEL_UNCOMPRESSED
+ jg startup_continue
+#else
+ jg startup_decompressor
+#endif
+
+.Lstack:
+ .long 0x8000 + (1<<(PAGE_SHIFT+THREAD_SIZE_ORDER))
+ .align 8
+6: .long 0x7fffffff,0xffffffff
+
+#include "head_kdump.S"
+
+#
+# params at 10400 (setup.h)
+#
+ .org PARMAREA
+ .long 0,0 # IPL_DEVICE
+ .long 0,0 # INITRD_START
+ .long 0,0 # INITRD_SIZE
+ .long 0,0 # OLDMEM_BASE
+ .long 0,0 # OLDMEM_SIZE
+
+ .org COMMAND_LINE
+ .byte "root=/dev/ram0 ro"
+ .byte 0
+
+ .org 0x11000
diff --git a/arch/s390/boot/head_kdump.S b/arch/s390/boot/head_kdump.S
new file mode 100644
index 000000000..174d6959b
--- /dev/null
+++ b/arch/s390/boot/head_kdump.S
@@ -0,0 +1,101 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * S390 kdump lowlevel functions (new kernel)
+ *
+ * Copyright IBM Corp. 2011
+ * Author(s): Michael Holzheu <holzheu@linux.vnet.ibm.com>
+ */
+
+#include <asm/sigp.h>
+
+#define DATAMOVER_ADDR 0x4000
+#define COPY_PAGE_ADDR 0x6000
+
+#ifdef CONFIG_CRASH_DUMP
+
+#
+# kdump entry (new kernel - not yet relocated)
+#
+# Note: This code has to be position independent
+#
+
+.align 2
+.Lep_startup_kdump:
+ lhi %r1,2 # mode 2 = esame (dump)
+ sigp %r1,%r0,SIGP_SET_ARCHITECTURE # Switch to esame mode
+ sam64 # Switch to 64 bit addressing
+ basr %r13,0
+.Lbase:
+ larl %r2,.Lbase_addr # Check, if we have been
+ lg %r2,0(%r2) # already relocated:
+ clgr %r2,%r13 #
+ jne .Lrelocate # No : Start data mover
+ lghi %r2,0 # Yes: Start kdump kernel
+ brasl %r14,startup_kdump_relocated
+
+.Lrelocate:
+ larl %r4,startup
+ lg %r2,0x418(%r4) # Get kdump base
+ lg %r3,0x420(%r4) # Get kdump size
+
+ larl %r10,.Lcopy_start # Source of data mover
+ lghi %r8,DATAMOVER_ADDR # Target of data mover
+ mvc 0(256,%r8),0(%r10) # Copy data mover code
+
+ agr %r8,%r2 # Copy data mover to
+ mvc 0(256,%r8),0(%r10) # reserved mem
+
+ lghi %r14,DATAMOVER_ADDR # Jump to copied data mover
+ basr %r14,%r14
+.Lbase_addr:
+ .quad .Lbase
+
+#
+# kdump data mover code (runs at address DATAMOVER_ADDR)
+#
+# r2: kdump base address
+# r3: kdump size
+#
+.Lcopy_start:
+ basr %r13,0 # Base
+0:
+ lgr %r11,%r2 # Save kdump base address
+ lgr %r12,%r2
+ agr %r12,%r3 # Compute kdump end address
+
+ lghi %r5,0
+ lghi %r10,COPY_PAGE_ADDR # Load copy page address
+1:
+ mvc 0(256,%r10),0(%r5) # Copy old kernel to tmp
+ mvc 0(256,%r5),0(%r11) # Copy new kernel to old
+ mvc 0(256,%r11),0(%r10) # Copy tmp to new
+ aghi %r11,256
+ aghi %r5,256
+ clgr %r11,%r12
+ jl 1b
+
+ lg %r14,.Lstartup_kdump-0b(%r13)
+ basr %r14,%r14 # Start relocated kernel
+.Lstartup_kdump:
+ .long 0x00000000,0x00000000 + startup_kdump_relocated
+.Lcopy_end:
+
+#
+# Startup of kdump (relocated new kernel)
+#
+.align 2
+startup_kdump_relocated:
+ basr %r13,0
+0: lpswe .Lrestart_psw-0b(%r13) # Start new kernel...
+.align 8
+.Lrestart_psw:
+ .quad 0x0000000080000000,0x0000000000000000 + startup
+#else
+.align 2
+.Lep_startup_kdump:
+ larl %r13,startup_kdump_crash
+ lpswe 0(%r13)
+.align 8
+startup_kdump_crash:
+ .quad 0x0002000080000000,0x0000000000000000 + startup_kdump_crash
+#endif /* CONFIG_CRASH_DUMP */
diff --git a/arch/s390/boot/install.sh b/arch/s390/boot/install.sh
new file mode 100644
index 000000000..bed227f26
--- /dev/null
+++ b/arch/s390/boot/install.sh
@@ -0,0 +1,35 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
+# arch/s390x/boot/install.sh
+#
+# Copyright (C) 1995 by Linus Torvalds
+#
+# Adapted from code in arch/i386/boot/Makefile by H. Peter Anvin
+#
+# "make install" script for s390 architecture
+#
+# Arguments:
+# $1 - kernel version
+# $2 - kernel image file
+# $3 - kernel map file
+# $4 - default install path (blank if root directory)
+#
+
+# User may have a custom install script
+
+if [ -x ~/bin/${INSTALLKERNEL} ]; then exec ~/bin/${INSTALLKERNEL} "$@"; fi
+if [ -x /sbin/${INSTALLKERNEL} ]; then exec /sbin/${INSTALLKERNEL} "$@"; fi
+
+# Default install - same as make zlilo
+
+if [ -f $4/vmlinuz ]; then
+ mv $4/vmlinuz $4/vmlinuz.old
+fi
+
+if [ -f $4/System.map ]; then
+ mv $4/System.map $4/System.old
+fi
+
+cat $2 > $4/vmlinuz
+cp $3 $4/System.map
diff --git a/arch/s390/boot/mem.S b/arch/s390/boot/mem.S
new file mode 100644
index 000000000..b33463633
--- /dev/null
+++ b/arch/s390/boot/mem.S
@@ -0,0 +1,2 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include "../lib/mem.S"
diff --git a/arch/s390/boot/sclp_early_core.c b/arch/s390/boot/sclp_early_core.c
new file mode 100644
index 000000000..5a19fd702
--- /dev/null
+++ b/arch/s390/boot/sclp_early_core.c
@@ -0,0 +1,2 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "../../../drivers/s390/char/sclp_early_core.c"
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 13:30:32 +0000