parisc: Add support for self-extracting kernel

RFC PATCH In review Helge Deller 1 participant 2 messages Aug 20, 2017 – Aug 21, 2017 PA-RISC architecture

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Helge Deller

author maintainer

2017-08-20 08:52 UTC #0 lore raw

RFC PATCH 1/1 parisc: Add support for self-extracting kernel

Signed-off-by Helge Deller <[email protected]>

arch/parisc/Kconfig +6 -0

index dda1f55..3109541 100644
@@ -17,6 +17,12 @@ config PARISC
 	select BUG
 	select BUILDTIME_EXTABLE_SORT
 	select HAVE_PERF_EVENTS
+	select HAVE_KERNEL_BZIP2
+	select HAVE_KERNEL_GZIP
+	select HAVE_KERNEL_LZ4
+	select HAVE_KERNEL_LZMA
+	select HAVE_KERNEL_LZO
+	select HAVE_KERNEL_XZ
 	select GENERIC_ATOMIC64 if !64BIT
 	select GENERIC_IRQ_PROBE
 	select GENERIC_PCI_IOMAP

arch/parisc/Makefile +13 -3

index 75cb451..58fae5d 100644
@@ -24,15 +24,20 @@ KBUILD_DEFCONFIG := default_defconfig
 NM		= sh $(srctree)/arch/parisc/nm
 CHECKFLAGS	+= -D__hppa__=1
 LIBGCC		= $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
+export LIBGCC
 
 ifdef CONFIG_64BIT
 UTS_MACHINE	:= parisc64
 CHECKFLAGS	+= -D__LP64__=1 -m64
 CC_ARCHES	= hppa64
+LD_BFD		:= elf64-hppa-linux
 else # 32-bit
 CC_ARCHES	= hppa hppa2.0 hppa1.1
+LD_BFD		:= elf32-hppa-linux
 endif
 
+export LD_BFD
+
 ifneq ($(SUBARCH),$(UTS_MACHINE))
 	ifeq ($(CROSS_COMPILE),)
 		CC_SUFFIXES = linux linux-gnu unknown-linux-gnu

@@ -88,6 +93,8 @@ libs-y	+= arch/parisc/lib/ $(LIBGCC)
 
 drivers-$(CONFIG_OPROFILE)		+= arch/parisc/oprofile/
 
+boot	:= arch/parisc/boot
+
 PALO := $(shell if (which palo 2>&1); then : ; \
 	elif [ -x /sbin/palo ]; then echo /sbin/palo; \
 	fi)

@@ -116,11 +123,14 @@ INSTALL_TARGETS = zinstall install
 
 PHONY += bzImage $(BOOT_TARGETS) $(INSTALL_TARGETS)
 
-bzImage zImage: vmlinuz
+zImage: vmlinuz
 Image: vmlinux
 
-vmlinuz: vmlinux
-	@gzip -cf -9 $< > $@
+bzImage: vmlinux
+	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
+
+vmlinuz: bzImage
+	$(OBJCOPY) $(boot)/bzImage $@
 
 install:
 	$(CONFIG_SHELL) $(src)/arch/parisc/install.sh \

arch/parisc/boot/.gitignore new file +2 -0

new file mode 100644
index 0000000..017d591
@@ -0,0 +1,2 @@
+image
+bzImage

arch/parisc/boot/Makefile new file +26 -0

new file mode 100644
index 0000000..cad68a5
@@ -0,0 +1,26 @@
+#
+# Makefile for the linux parisc-specific parts of the boot image creator.
+#
+
+COMPILE_VERSION := __linux_compile_version_id__`hostname |  \
+			tr -c '[0-9A-Za-z]' '_'`__`date | \
+			tr -c '[0-9A-Za-z]' '_'`_t
+
+ccflags-y  := -DCOMPILE_VERSION=$(COMPILE_VERSION) -gstabs -I.
+
+targets := image
+targets += bzImage
+subdir- := compressed
+
+$(obj)/image: vmlinux FORCE
+	$(call if_changed,objcopy)
+
+$(obj)/bzImage: $(obj)/compressed/vmlinux FORCE
+	$(call if_changed,objcopy)
+
+$(obj)/compressed/vmlinux: FORCE
+	$(Q)$(MAKE) $(build)=$(obj)/compressed $@
+
+install: $(CONFIGURE) $(obj)/bzImage
+	sh -x  $(srctree)/$(obj)/install.sh $(KERNELRELEASE) $(obj)/bzImage \
+	      System.map "$(INSTALL_PATH)"

arch/parisc/boot/compressed/.gitignore new file +3 -0

new file mode 100644
index 0000000..ae06b9b
@@ -0,0 +1,3 @@
+sizes.h
+vmlinux
+vmlinux.lds

arch/parisc/boot/compressed/Makefile new file +87 -0

87 lines not on this page · raw message

arch/parisc/boot/compressed/head.S new file +85 -0

85 lines not on this page · raw message

arch/parisc/boot/compressed/misc.c new file +301 -0

301 lines not on this page · raw message

arch/parisc/boot/compressed/vmlinux.lds.S new file +101 -0

101 lines not on this page · raw message

arch/parisc/boot/compressed/vmlinux.scr new file +10 -0

new file mode 100644
index 0000000..dac2d14
@@ -0,0 +1,10 @@
+SECTIONS
+{
+  .rodata.compressed : {
+	input_len = .;
+	LONG(input_data_end - input_data) input_data = .;
+	*(.data)
+	output_len = . - 4; /* can be at unaligned address */
+	input_data_end = .;
+	}
+}

arch/parisc/boot/install.sh new file +65 -0

65 lines not on this page · raw message

arch/parisc/include/asm/page.h +4 -0

index 80e742a..bfed09d 100644
@@ -116,11 +116,15 @@ extern int npmem_ranges;
 /* This governs the relationship between virtual and physical addresses.
  * If you alter it, make sure to take care of our various fixed mapping
  * segments in fixmap.h */
+#if defined(BOOTLOADER)
+#define __PAGE_OFFSET	(0)		/* bootloader uses physical addresses */
+#else
 #ifdef CONFIG_64BIT
 #define __PAGE_OFFSET	(0x40000000)	/* 1GB */
 #else
 #define __PAGE_OFFSET	(0x10000000)	/* 256MB */
 #endif
+#endif /* BOOTLOADER */
 
 #define PAGE_OFFSET		((unsigned long)__PAGE_OFFSET)

arch/parisc/include/asm/pdc.h +2 -0

index 7569627..26b4455 100644
@@ -5,6 +5,8 @@
 
 #if !defined(__ASSEMBLY__)
 
+extern int parisc_narrow_firmware;
+
 extern int pdc_type;
 extern unsigned long parisc_cell_num; /* cell number the CPU runs on (PAT) */
 extern unsigned long parisc_cell_loc; /* cell location of CPU (PAT)	   */

arch/parisc/kernel/firmware.c +14 -1

index f622a31..41efeed 100644
@@ -69,7 +69,15 @@
 #include <asm/pdcpat.h>
 #include <asm/processor.h>	/* for boot_cpu_data */
 
+#if defined(BOOTLOADER)
+# undef  spin_lock_irqsave
+# define spin_lock_irqsave(a,b) b = 1
+# undef  spin_unlock_irqrestore
+# define spin_unlock_irqrestore(a,b)
+#else
 static DEFINE_SPINLOCK(pdc_lock);
+#endif
+
 extern unsigned long pdc_result[NUM_PDC_RESULT];
 extern unsigned long pdc_result2[NUM_PDC_RESULT];

@@ -186,6 +194,8 @@ void set_firmware_width(void)
 }
 #endif /*CONFIG_64BIT*/
 
+
+#if !defined(BOOTLOADER)
 /**
  * pdc_emergency_unlock - Unlock the linux pdc lock
  *

@@ -1143,6 +1153,8 @@ void pdc_io_reset_devices(void)
 	spin_unlock_irqrestore(&pdc_lock, flags);
 }
 
+#endif /* defined(BOOTLOADER) */
+
 /* locked by pdc_console_lock */
 static int __attribute__((aligned(8)))   iodc_retbuf[32];
 static char __attribute__((aligned(64))) iodc_dbuf[4096];

@@ -1187,6 +1199,7 @@ int pdc_iodc_print(const unsigned char *str, unsigned count)
 	return i;
 }
 
+#if !defined(BOOTLOADER)
 /**
  * pdc_iodc_getc - Read a character (non-blocking) from the PDC console.
  *

@@ -1524,6 +1537,7 @@ int pdc_pat_mem_get_dimm_phys_location(
 	return retval;
 }
 #endif /* CONFIG_64BIT */
+#endif /* defined(BOOTLOADER) */
 
 
 /***************** 32-bit real-mode calls ***********/

@@ -1633,4 +1647,3 @@ long real64_call(unsigned long fn, ...)
 }
 
 #endif /* CONFIG_64BIT */
-

arch/parisc/kernel/real2.S +4 -0

index 1db58e5..cc99634 100644
@@ -162,6 +162,7 @@ ENDPROC_CFI(restore_control_regs)
 	.text
 	.align 128
 ENTRY_CFI(rfi_virt2real)
+#if !defined(BOOTLOADER)
 	/* switch to real mode... */
 	rsm		PSW_SM_I,%r0
 	load32		PA(rfi_v2r_1), %r1

@@ -191,6 +192,7 @@ ENTRY_CFI(rfi_virt2real)
 	nop
 rfi_v2r_1:
 	tophys_r1 %r2
+#endif /* defined(BOOTLOADER) */
 	bv	0(%r2)
 	nop
 ENDPROC_CFI(rfi_virt2real)

@@ -198,6 +200,7 @@ ENDPROC_CFI(rfi_virt2real)
 	.text
 	.align 128
 ENTRY_CFI(rfi_real2virt)
+#if !defined(BOOTLOADER)
 	rsm		PSW_SM_I,%r0
 	load32		(rfi_r2v_1), %r1
 	nop

@@ -226,6 +229,7 @@ ENTRY_CFI(rfi_real2virt)
 	nop
 rfi_r2v_1:
 	tovirt_r1 %r2
+#endif /* defined(BOOTLOADER) */
 	bv	0(%r2)
 	nop
 ENDPROC_CFI(rfi_real2virt)

Helge Deller

author maintainer

2017-08-21 14:24 UTC #1 lore raw

The patch below is missing on top of the old patch I sent. It's needed to avoid usage of fp registers.
This patch unbreaks booting the lzma variants (XZ, LZO, LZMA,...)

Signed-off-by Helge Deller <[email protected]>

Helge

arch/parisc/boot/compressed/Makefile +1 -2

index 9b2d304..5450a11 100644
@@ -15,8 +15,7 @@ targets += misc.o piggy.o sizes.h head.o real2.o firmware.o
 KBUILD_CFLAGS := -D__KERNEL__ -O2 -DBOOTLOADER
 KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
 KBUILD_CFLAGS += $(cflags-y) -fno-delete-null-pointer-checks
-KBUILD_CFLAGS += $(call cc-option,-mpacked-stack)
-KBUILD_CFLAGS += -fno-PIE -mno-space-regs
+KBUILD_CFLAGS += -fno-PIE -mno-space-regs -mdisable-fpregs
 ifndef CONFIG_64BIT
 KBUILD_CFLAGS += -mfast-indirect-calls
 endif