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oxnas: allow booting with legacy loaders

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Signed-off-by: Daniel Golle <daniel@makrotopia.org>
This commit is contained in:
Daniel Golle 2016-09-04 02:09:01 +02:00
parent 02a9a74d17
commit fe89f90119
4 changed files with 387 additions and 23 deletions
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16
target/linux/oxnas/config-4.1
View file

@ -23,6 +23,11 @@ CONFIG_ARCH_WANT_GENERAL_HUGETLB=y
CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y
CONFIG_ARCH_WANT_LIBATA_LEDS=y
CONFIG_ARM=y
CONFIG_ARM_APPENDED_DTB=y
CONFIG_ARM_ATAG_DTB_COMPAT=y
# CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND is not set
# CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER is not set
CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE=y
CONFIG_ARM_CPUIDLE=y
# CONFIG_ARM_CPU_SUSPEND is not set
CONFIG_ARM_DMA_IOMMU_ALIGNMENT=8
@ -51,7 +56,6 @@ CONFIG_CLKSRC_RPS_TIMER=y
CONFIG_CLONE_BACKWARDS=y
CONFIG_CMDLINE="console=ttyS0,115200n8 earlyprintk=serial"
CONFIG_COMMON_CLK=y
# CONFIG_COMMON_CLK_PWM is not set
CONFIG_COMPACTION=y
CONFIG_CONSOLE_POLL=y
CONFIG_COREDUMP=y
@ -79,6 +83,8 @@ CONFIG_CRC16=y
CONFIG_CRC32_SLICEBY8=y
CONFIG_CRYPTO_DEFLATE=y
CONFIG_CRYPTO_LZO=y
CONFIG_CRYPTO_RNG2=y
CONFIG_CRYPTO_WORKQUEUE=y
CONFIG_CRYPTO_XZ=y
CONFIG_DCACHE_WORD_ACCESS=y
CONFIG_DEBUG_ICEDCC=y
@ -86,6 +92,7 @@ CONFIG_DEBUG_LL=y
CONFIG_DEBUG_LL_INCLUDE="debug/icedcc.S"
# CONFIG_DEBUG_UART_8250 is not set
# CONFIG_DEBUG_USER is not set
# CONFIG_DEFAULT_CFQ is not set
CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=16
CONFIG_DETECT_HUNG_TASK=y
CONFIG_DIRECT_IO=y
@ -173,7 +180,6 @@ CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
CONFIG_HAVE_UID16=y
CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
CONFIG_HOTPLUG_CPU=y
# CONFIG_HSU_DMA_PCI is not set
CONFIG_HZ_FIXED=0
CONFIG_I2C=y
CONFIG_I2C_ALGOBIT=y
@ -187,6 +193,7 @@ CONFIG_IOMMU_IO_PGTABLE=y
CONFIG_IOMMU_IO_PGTABLE_LPAE=y
# CONFIG_IOMMU_IO_PGTABLE_LPAE_SELFTEST is not set
CONFIG_IOMMU_SUPPORT=y
CONFIG_IOSCHED_CFQ=y
# CONFIG_IP_ADVANCED_ROUTER is not set
# CONFIG_IP_MULTICAST is not set
CONFIG_IP_PNP=y
@ -279,7 +286,6 @@ CONFIG_PCIEASPM_DEFAULT=y
# CONFIG_PCIEASPM_PERFORMANCE is not set
# CONFIG_PCIEASPM_POWERSAVE is not set
CONFIG_PCIEPORTBUS=y
# CONFIG_PCIE_IPROC is not set
CONFIG_PCIE_PME=y
# CONFIG_PCI_DOMAINS_GENERIC is not set
CONFIG_PCI_OXNAS=y
@ -295,16 +301,12 @@ CONFIG_PM_CLK=y
CONFIG_POWER_RESET=y
# CONFIG_POWER_RESET_BRCMSTB is not set
CONFIG_POWER_RESET_GPIO=y
# CONFIG_POWER_RESET_GPIO_RESTART is not set
# CONFIG_POWER_RESET_LTC2952 is not set
# CONFIG_POWER_RESET_SYSCON is not set
CONFIG_POWER_RESET_SYSCON_POWEROFF=y
CONFIG_POWER_SUPPLY=y
CONFIG_PPS=y
CONFIG_PRINTK_TIME=y
CONFIG_PTP_1588_CLOCK=y
CONFIG_PWM=y
# CONFIG_PWM_FSL_FTM is not set
CONFIG_PWM_SYSFS=y
CONFIG_RAS=y
CONFIG_RATIONAL=y

24
target/linux/oxnas/config-4.4
View file

@ -23,6 +23,11 @@ CONFIG_ARCH_WANT_GENERAL_HUGETLB=y
CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y
CONFIG_ARCH_WANT_LIBATA_LEDS=y
CONFIG_ARM=y
CONFIG_ARM_APPENDED_DTB=y
CONFIG_ARM_ATAG_DTB_COMPAT=y
# CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND is not set
# CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER is not set
CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE=y
CONFIG_ARM_CPUIDLE=y
# CONFIG_ARM_CPU_SUSPEND is not set
CONFIG_ARM_DMA_IOMMU_ALIGNMENT=8
@ -35,6 +40,7 @@ CONFIG_ARM_SMMU=y
CONFIG_ARM_THUMB=y
CONFIG_ARM_UNWIND=y
CONFIG_ATA_LEDS=y
CONFIG_ATAGS=y
CONFIG_AUTO_ZRELADDR=y
# CONFIG_BLK_DEV_INITRD is not set
CONFIG_BLK_DEV_SD=y
@ -50,6 +56,7 @@ CONFIG_CLKSRC_PROBE=y
CONFIG_CLKSRC_RPS_TIMER=y
CONFIG_CLONE_BACKWARDS=y
CONFIG_CMDLINE="console=ttyS0,115200n8 earlyprintk=serial"
CONFIG_CMDLINE_FROM_BOOTLOADER=y
CONFIG_COMMON_CLK=y
CONFIG_COMPACTION=y
CONFIG_CONSOLE_POLL=y
@ -89,6 +96,7 @@ CONFIG_DEBUG_LL_INCLUDE="debug/icedcc.S"
# CONFIG_DEBUG_UART_8250 is not set
# CONFIG_DEBUG_USER is not set
CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=16
CONFIG_DEPRECATED_PARAM_STRUCT=y
CONFIG_DETECT_HUNG_TASK=y
CONFIG_DIRECT_IO=y
CONFIG_DMADEVICES=y
@ -100,13 +108,7 @@ CONFIG_DNOTIFY=y
CONFIG_DTC=y
CONFIG_DT_IDLE_STATES=y
CONFIG_DWMAC_GENERIC=y
# CONFIG_DWMAC_IPQ806X is not set
# CONFIG_DWMAC_LPC18XX is not set
# CONFIG_DWMAC_MESON is not set
CONFIG_DWMAC_OXNAS=y
# CONFIG_DWMAC_ROCKCHIP is not set
# CONFIG_DWMAC_SOCFPGA is not set
# CONFIG_DWMAC_STI is not set
# CONFIG_DWMAC_SUNXI is not set
# CONFIG_DW_DMAC_PCI is not set
CONFIG_EARLY_PRINTK=y
@ -167,11 +169,6 @@ CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_GENERIC_DMA_COHERENT=y
CONFIG_HAVE_IDE=y
CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y
CONFIG_HAVE_KERNEL_GZIP=y
CONFIG_HAVE_KERNEL_LZ4=y
CONFIG_HAVE_KERNEL_LZMA=y
CONFIG_HAVE_KERNEL_LZO=y
CONFIG_HAVE_KERNEL_XZ=y
CONFIG_HAVE_MEMBLOCK=y
CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
CONFIG_HAVE_NET_DSA=y
@ -229,8 +226,6 @@ CONFIG_LDM_PARTITION=y
CONFIG_LIBFDT=y
CONFIG_LOCKUP_DETECTOR=y
CONFIG_LOCK_SPIN_ON_OWNER=y
CONFIG_LZ4_COMPRESS=y
CONFIG_LZ4_DECOMPRESS=y
CONFIG_LZO_COMPRESS=y
CONFIG_LZO_DECOMPRESS=y
CONFIG_MACH_OX820=y
@ -305,7 +300,6 @@ CONFIG_PM=y
CONFIG_PM_CLK=y
# CONFIG_PM_DEBUG is not set
CONFIG_POWER_RESET=y
# CONFIG_POWER_RESET_BRCMSTB is not set
CONFIG_POWER_RESET_GPIO=y
CONFIG_POWER_RESET_SYSCON_POWEROFF=y
CONFIG_POWER_SUPPLY=y
@ -339,14 +333,12 @@ CONFIG_SERIAL_8250_PCI=y
CONFIG_SERIAL_8250_RUNTIME_UARTS=1
# CONFIG_SERIAL_KGDB_NMI is not set
CONFIG_SERIAL_OF_PLATFORM=y
# CONFIG_SG_SPLIT is not set
CONFIG_SMP=y
CONFIG_SMP_ON_UP=y
CONFIG_SRCU=y
CONFIG_STMMAC_ETH=y
CONFIG_STMMAC_PLATFORM=y
# CONFIG_STRIP_ASM_SYMS is not set
# CONFIG_SUNXI_SRAM is not set
CONFIG_SWIOTLB=y
CONFIG_SYS_SUPPORTS_APM_EMULATION=y
CONFIG_TREE_RCU=y

185
target/linux/oxnas/patches-4.1/996-ATAG_DTB_COMPAT_CMDLINE_MANGLE.patch Normal file
View file

@ -0,0 +1,185 @@
Author: Adrian Panella <ianchi74@outlook.com>
Date: Fri Jun 10 19:10:15 2016 -0500
generic: Mangle bootloader's kernel arguments
The command-line arguments provided by the boot loader will be
appended to a new device tree property: bootloader-args.
If there is a property "append-rootblock" in DT under /chosen
and a root= option in bootloaders command line it will be parsed
and added to DT bootargs with the form: <append-rootblock>XX.
Only command line ATAG will be processed, the rest of the ATAGs
sent by bootloader will be ignored.
This is usefull in dual boot systems, to get the current root partition
without afecting the rest of the system.
Signed-off-by: Adrian Panella <ianchi74@outlook.com>
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1928,6 +1928,17 @@ config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEN
The command-line arguments provided by the boot loader will be
appended to the the device tree bootargs property.
+config ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE
+ bool "Append rootblock parsing bootloader's kernel arguments"
+ help
+ The command-line arguments provided by the boot loader will be
+ appended to a new device tree property: bootloader-args.
+ If there is a property "append-rootblock" in DT under /chosen
+ and a root= option in bootloaders command line it will be parsed
+ and added to DT bootargs with the form: <append-rootblock>XX.
+ Only command line ATAG will be processed, the rest of the ATAGs
+ sent by bootloader will be ignored.
+
endchoice
config CMDLINE
--- a/arch/arm/boot/compressed/atags_to_fdt.c
+++ b/arch/arm/boot/compressed/atags_to_fdt.c
@@ -3,6 +3,8 @@
#if defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND)
#define do_extend_cmdline 1
+#elif defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE)
+#define do_extend_cmdline 1
#else
#define do_extend_cmdline 0
#endif
@@ -66,6 +68,59 @@ static uint32_t get_cell_size(const void
return cell_size;
}
+#if defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE)
+
+static char *append_rootblock(char *dest, const char *str, int len, void *fdt)
+{
+ char *ptr, *end;
+ char *root="root=";
+ int i, l;
+ const char *rootblock;
+
+ //ARM doesn't have __HAVE_ARCH_STRSTR, so search manually
+ ptr = str - 1;
+
+ do {
+ //first find an 'r' at the begining or after a space
+ do {
+ ptr++;
+ ptr = strchr(ptr, 'r');
+ if(!ptr) return dest;
+
+ } while (ptr != str && *(ptr-1) != ' ');
+
+ //then check for the rest
+ for(i = 1; i <= 4; i++)
+ if(*(ptr+i) != *(root+i)) break;
+
+ } while (i != 5);
+
+ end = strchr(ptr, ' ');
+ end = end ? (end - 1) : (strchr(ptr, 0) - 1);
+
+ //find partition number (assumes format root=/dev/mtdXX | /dev/mtdblockXX | yy:XX )
+ for( i = 0; end >= ptr && *end >= '0' && *end <= '9'; end--, i++);
+ ptr = end + 1;
+
+ /* if append-rootblock property is set use it to append to command line */
+ rootblock = getprop(fdt, "/chosen", "append-rootblock", &l);
+ if(rootblock != NULL) {
+ if(*dest != ' ') {
+ *dest = ' ';
+ dest++;
+ len++;
+ }
+ if (len + l + i <= COMMAND_LINE_SIZE) {
+ memcpy(dest, rootblock, l);
+ dest += l - 1;
+ memcpy(dest, ptr, i);
+ dest += i;
+ }
+ }
+ return dest;
+}
+#endif
+
static void merge_fdt_bootargs(void *fdt, const char *fdt_cmdline)
{
char cmdline[COMMAND_LINE_SIZE];
@@ -85,12 +140,21 @@ static void merge_fdt_bootargs(void *fdt
/* and append the ATAG_CMDLINE */
if (fdt_cmdline) {
+
+#if defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE)
+ //save original bootloader args
+ //and append ubi.mtd with root partition number to current cmdline
+ setprop_string(fdt, "/chosen", "bootloader-args", fdt_cmdline);
+ ptr = append_rootblock(ptr, fdt_cmdline, len, fdt);
+
+#else
len = strlen(fdt_cmdline);
if (ptr - cmdline + len + 2 < COMMAND_LINE_SIZE) {
*ptr++ = ' ';
memcpy(ptr, fdt_cmdline, len);
ptr += len;
}
+#endif
}
*ptr = '\0';
@@ -147,7 +211,9 @@ int atags_to_fdt(void *atag_list, void *
else
setprop_string(fdt, "/chosen", "bootargs",
atag->u.cmdline.cmdline);
- } else if (atag->hdr.tag == ATAG_MEM) {
+ }
+#ifndef CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE
+ else if (atag->hdr.tag == ATAG_MEM) {
if (memcount >= sizeof(mem_reg_property)/4)
continue;
if (!atag->u.mem.size)
@@ -186,6 +252,10 @@ int atags_to_fdt(void *atag_list, void *
setprop(fdt, "/memory", "reg", mem_reg_property,
4 * memcount * memsize);
}
+#else
+
+ }
+#endif
return fdt_pack(fdt);
}
--- a/init/main.c
+++ b/init/main.c
@@ -88,6 +88,10 @@
#include <asm/sections.h>
#include <asm/cacheflush.h>
+#if defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE)
+#include <linux/of.h>
+#endif
+
static int kernel_init(void *);
extern void init_IRQ(void);
@@ -560,6 +564,18 @@ asmlinkage __visible void __init start_k
page_alloc_init();
pr_notice("Kernel command line: %s\n", boot_command_line);
+
+#if defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE)
+ //Show bootloader's original command line for reference
+ if(of_chosen) {
+ const char *prop = of_get_property(of_chosen, "bootloader-args", NULL);
+ if(prop)
+ pr_notice("Bootloader command line (ignored): %s\n", prop);
+ else
+ pr_notice("Bootloader command line not present\n");
+ }
+#endif
+
parse_early_param();
after_dashes = parse_args("Booting kernel",
static_command_line, __start___param,

185
target/linux/oxnas/patches-4.4/996-ATAG_DTB_COMPAT_CMDLINE_MANGLE.patch Normal file
View file

@ -0,0 +1,185 @@
Author: Adrian Panella <ianchi74@outlook.com>
Date: Fri Jun 10 19:10:15 2016 -0500
generic: Mangle bootloader's kernel arguments
The command-line arguments provided by the boot loader will be
appended to a new device tree property: bootloader-args.
If there is a property "append-rootblock" in DT under /chosen
and a root= option in bootloaders command line it will be parsed
and added to DT bootargs with the form: <append-rootblock>XX.
Only command line ATAG will be processed, the rest of the ATAGs
sent by bootloader will be ignored.
This is usefull in dual boot systems, to get the current root partition
without afecting the rest of the system.
Signed-off-by: Adrian Panella <ianchi74@outlook.com>
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1928,6 +1928,17 @@ config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEN
The command-line arguments provided by the boot loader will be
appended to the the device tree bootargs property.
+config ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE
+ bool "Append rootblock parsing bootloader's kernel arguments"
+ help
+ The command-line arguments provided by the boot loader will be
+ appended to a new device tree property: bootloader-args.
+ If there is a property "append-rootblock" in DT under /chosen
+ and a root= option in bootloaders command line it will be parsed
+ and added to DT bootargs with the form: <append-rootblock>XX.
+ Only command line ATAG will be processed, the rest of the ATAGs
+ sent by bootloader will be ignored.
+
endchoice
config CMDLINE
--- a/arch/arm/boot/compressed/atags_to_fdt.c
+++ b/arch/arm/boot/compressed/atags_to_fdt.c
@@ -3,6 +3,8 @@
#if defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND)
#define do_extend_cmdline 1
+#elif defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE)
+#define do_extend_cmdline 1
#else
#define do_extend_cmdline 0
#endif
@@ -66,6 +68,59 @@ static uint32_t get_cell_size(const void
return cell_size;
}
+#if defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE)
+
+static char *append_rootblock(char *dest, const char *str, int len, void *fdt)
+{
+ char *ptr, *end;
+ char *root="root=";
+ int i, l;
+ const char *rootblock;
+
+ //ARM doesn't have __HAVE_ARCH_STRSTR, so search manually
+ ptr = str - 1;
+
+ do {
+ //first find an 'r' at the begining or after a space
+ do {
+ ptr++;
+ ptr = strchr(ptr, 'r');
+ if(!ptr) return dest;
+
+ } while (ptr != str && *(ptr-1) != ' ');
+
+ //then check for the rest
+ for(i = 1; i <= 4; i++)
+ if(*(ptr+i) != *(root+i)) break;
+
+ } while (i != 5);
+
+ end = strchr(ptr, ' ');
+ end = end ? (end - 1) : (strchr(ptr, 0) - 1);
+
+ //find partition number (assumes format root=/dev/mtdXX | /dev/mtdblockXX | yy:XX )
+ for( i = 0; end >= ptr && *end >= '0' && *end <= '9'; end--, i++);
+ ptr = end + 1;
+
+ /* if append-rootblock property is set use it to append to command line */
+ rootblock = getprop(fdt, "/chosen", "append-rootblock", &l);
+ if(rootblock != NULL) {
+ if(*dest != ' ') {
+ *dest = ' ';
+ dest++;
+ len++;
+ }
+ if (len + l + i <= COMMAND_LINE_SIZE) {
+ memcpy(dest, rootblock, l);
+ dest += l - 1;
+ memcpy(dest, ptr, i);
+ dest += i;
+ }
+ }
+ return dest;
+}
+#endif
+
static void merge_fdt_bootargs(void *fdt, const char *fdt_cmdline)
{
char cmdline[COMMAND_LINE_SIZE];
@@ -85,12 +140,21 @@ static void merge_fdt_bootargs(void *fdt
/* and append the ATAG_CMDLINE */
if (fdt_cmdline) {
+
+#if defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE)
+ //save original bootloader args
+ //and append ubi.mtd with root partition number to current cmdline
+ setprop_string(fdt, "/chosen", "bootloader-args", fdt_cmdline);
+ ptr = append_rootblock(ptr, fdt_cmdline, len, fdt);
+
+#else
len = strlen(fdt_cmdline);
if (ptr - cmdline + len + 2 < COMMAND_LINE_SIZE) {
*ptr++ = ' ';
memcpy(ptr, fdt_cmdline, len);
ptr += len;
}
+#endif
}
*ptr = '\0';
@@ -147,7 +211,9 @@ int atags_to_fdt(void *atag_list, void *
else
setprop_string(fdt, "/chosen", "bootargs",
atag->u.cmdline.cmdline);
- } else if (atag->hdr.tag == ATAG_MEM) {
+ }
+#ifndef CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE
+ else if (atag->hdr.tag == ATAG_MEM) {
if (memcount >= sizeof(mem_reg_property)/4)
continue;
if (!atag->u.mem.size)
@@ -186,6 +252,10 @@ int atags_to_fdt(void *atag_list, void *
setprop(fdt, "/memory", "reg", mem_reg_property,
4 * memcount * memsize);
}
+#else
+
+ }
+#endif
return fdt_pack(fdt);
}
--- a/init/main.c
+++ b/init/main.c
@@ -88,6 +88,10 @@
#include <asm/sections.h>
#include <asm/cacheflush.h>
+#if defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE)
+#include <linux/of.h>
+#endif
+
static int kernel_init(void *);
extern void init_IRQ(void);
@@ -560,6 +564,18 @@ asmlinkage __visible void __init start_k
page_alloc_init();
pr_notice("Kernel command line: %s\n", boot_command_line);
+
+#if defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE)
+ //Show bootloader's original command line for reference
+ if(of_chosen) {
+ const char *prop = of_get_property(of_chosen, "bootloader-args", NULL);
+ if(prop)
+ pr_notice("Bootloader command line (ignored): %s\n", prop);
+ else
+ pr_notice("Bootloader command line not present\n");
+ }
+#endif
+
parse_early_param();
after_dashes = parse_args("Booting kernel",
static_command_line, __start___param,