diff options
| -rw-r--r-- | arch/xtensa/Kconfig | 48 | ||||
| -rw-r--r-- | arch/xtensa/Makefile | 3 | ||||
| -rw-r--r-- | arch/xtensa/boot/Makefile | 5 | ||||
| -rw-r--r-- | arch/xtensa/configs/xip_kc705_defconfig | 119 | ||||
| -rw-r--r-- | arch/xtensa/include/asm/cache.h | 6 | ||||
| -rw-r--r-- | arch/xtensa/include/asm/page.h | 11 | ||||
| -rw-r--r-- | arch/xtensa/include/asm/vectors.h | 4 | ||||
| -rw-r--r-- | arch/xtensa/kernel/head.S | 7 | ||||
| -rw-r--r-- | arch/xtensa/kernel/setup.c | 7 | ||||
| -rw-r--r-- | arch/xtensa/kernel/vmlinux.lds.S | 52 |
10 files changed, 257 insertions, 5 deletions
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index ea9f63c7672d..bf492f9e1f75 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -19,8 +19,8 @@ config XTENSA select GENERIC_PCI_IOMAP select GENERIC_SCHED_CLOCK select GENERIC_STRNCPY_FROM_USER if KASAN - select HAVE_ARCH_JUMP_LABEL - select HAVE_ARCH_KASAN if MMU + select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL + select HAVE_ARCH_KASAN if MMU && !XIP_KERNEL select HAVE_ARCH_TRACEHOOK select HAVE_DEBUG_KMEMLEAK select HAVE_DMA_CONTIGUOUS @@ -299,6 +299,9 @@ config XTENSA_CALIBRATE_CCOUNT config SERIAL_CONSOLE def_bool n +config PLATFORM_HAVE_XIP + def_bool n + menu "Platform options" choice @@ -325,6 +328,7 @@ config XTENSA_PLATFORM_XTFPGA select PLATFORM_WANT_DEFAULT_MEM if !MMU select SERIAL_CONSOLE select XTENSA_CALIBRATE_CCOUNT + select PLATFORM_HAVE_XIP help XTFPGA is the name of Tensilica board family (LX60, LX110, LX200, ML605). This hardware is capable of running a full Linux distribution. @@ -478,6 +482,27 @@ config INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX If in doubt, say Y. +config XIP_KERNEL + bool "Kernel Execute-In-Place from ROM" + depends on PLATFORM_HAVE_XIP + help + Execute-In-Place allows the kernel to run from non-volatile storage + directly addressable by the CPU, such as NOR flash. This saves RAM + space since the text section of the kernel is not loaded from flash + to RAM. Read-write sections, such as the data section and stack, + are still copied to RAM. The XIP kernel is not compressed since + it has to run directly from flash, so it will take more space to + store it. The flash address used to link the kernel object files, + and for storing it, is configuration dependent. Therefore, if you + say Y here, you must know the proper physical address where to + store the kernel image depending on your own flash memory usage. + + Also note that the make target becomes "make xipImage" rather than + "make Image" or "make uImage". The final kernel binary to put in + ROM memory will be arch/xtensa/boot/xipImage. + + If unsure, say N. + config MEMMAP_CACHEATTR hex "Cache attributes for the memory address space" depends on !MMU @@ -522,6 +547,16 @@ config KSEG_PADDR If unsure, leave the default value here. +config KERNEL_VIRTUAL_ADDRESS + hex "Kernel virtual address" + depends on MMU && XIP_KERNEL + default 0xd0003000 + help + This is the virtual address where the XIP kernel is mapped. + XIP kernel may be mapped into KSEG or KIO region, virtual address + provided here must match kernel load address provided in + KERNEL_LOAD_ADDRESS. + config KERNEL_LOAD_ADDRESS hex "Kernel load address" default 0x60003000 if !MMU @@ -537,12 +572,21 @@ config KERNEL_LOAD_ADDRESS config VECTORS_OFFSET hex "Kernel vectors offset" default 0x00003000 + depends on !XIP_KERNEL help This is the offset of the kernel image from the relocatable vectors base. If unsure, leave the default value here. +config XIP_DATA_ADDR + hex "XIP kernel data virtual address" + depends on XIP_KERNEL + default 0x00000000 + help + This is the virtual address where XIP kernel data is copied. + It must be within KSEG if MMU is used. + config PLATFORM_WANT_DEFAULT_MEM def_bool n diff --git a/arch/xtensa/Makefile b/arch/xtensa/Makefile index 1542018c9e57..67a7d151d1e7 100644 --- a/arch/xtensa/Makefile +++ b/arch/xtensa/Makefile @@ -87,7 +87,7 @@ drivers-$(CONFIG_OPROFILE) += arch/xtensa/oprofile/ boot := arch/xtensa/boot -all Image zImage uImage: vmlinux +all Image zImage uImage xipImage: vmlinux $(Q)$(MAKE) $(build)=$(boot) $@ archheaders: @@ -97,4 +97,5 @@ define archhelp @echo '* Image - Kernel ELF image with reset vector' @echo '* zImage - Compressed kernel image (arch/xtensa/boot/images/zImage.*)' @echo '* uImage - U-Boot wrapped image' + @echo ' xipImage - XIP image' endef diff --git a/arch/xtensa/boot/Makefile b/arch/xtensa/boot/Makefile index 294846117fc2..efb91bfda2b4 100644 --- a/arch/xtensa/boot/Makefile +++ b/arch/xtensa/boot/Makefile @@ -29,6 +29,7 @@ all: $(boot-y) Image: boot-elf zImage: boot-redboot uImage: $(obj)/uImage +xipImage: $(obj)/xipImage boot-elf boot-redboot: $(addprefix $(obj)/,$(subdir-y)) $(Q)$(MAKE) $(build)=$(obj)/$@ $(MAKECMDGOALS) @@ -50,3 +51,7 @@ UIMAGE_COMPRESSION = gzip $(obj)/uImage: vmlinux.bin.gz FORCE $(call if_changed,uimage) $(Q)$(kecho) ' Kernel: $@ is ready' + +$(obj)/xipImage: vmlinux FORCE + $(call if_changed,objcopy) + $(Q)$(kecho) ' Kernel: $@ is ready' diff --git a/arch/xtensa/configs/xip_kc705_defconfig b/arch/xtensa/configs/xip_kc705_defconfig new file mode 100644 index 000000000000..f9e85c082afc --- /dev/null +++ b/arch/xtensa/configs/xip_kc705_defconfig @@ -0,0 +1,119 @@ +CONFIG_SYSVIPC=y +CONFIG_POSIX_MQUEUE=y +CONFIG_NO_HZ_IDLE=y +CONFIG_HIGH_RES_TIMERS=y +CONFIG_PREEMPT=y +CONFIG_IRQ_TIME_ACCOUNTING=y +CONFIG_BSD_PROCESS_ACCT=y +CONFIG_MEMCG=y +CONFIG_CGROUP_FREEZER=y +CONFIG_CGROUP_DEVICE=y +CONFIG_CGROUP_CPUACCT=y +CONFIG_CGROUP_DEBUG=y +CONFIG_NAMESPACES=y +CONFIG_SCHED_AUTOGROUP=y +CONFIG_RELAY=y +CONFIG_BLK_DEV_INITRD=y +CONFIG_EXPERT=y +CONFIG_KALLSYMS_ALL=y +CONFIG_PROFILING=y +CONFIG_XTENSA_VARIANT_DC233C=y +CONFIG_XTENSA_UNALIGNED_USER=y +CONFIG_XIP_KERNEL=y +CONFIG_XIP_DATA_ADDR=0xd0000000 +CONFIG_KERNEL_VIRTUAL_ADDRESS=0xe6000000 +CONFIG_KERNEL_LOAD_ADDRESS=0xf6000000 +CONFIG_XTENSA_KSEG_512M=y +CONFIG_HIGHMEM=y +CONFIG_XTENSA_PLATFORM_XTFPGA=y +CONFIG_CMDLINE_BOOL=y +CONFIG_CMDLINE="earlycon=uart8250,mmio32native,0xfd050020,115200n8 console=ttyS0,115200n8 ip=dhcp root=/dev/nfs rw debug memmap=0x38000000@0" +CONFIG_USE_OF=y +CONFIG_BUILTIN_DTB_SOURCE="kc705" +# CONFIG_PARSE_BOOTPARAM is not set +CONFIG_OPROFILE=y +# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set +# CONFIG_COMPACTION is not set +CONFIG_NET=y +CONFIG_PACKET=y +CONFIG_UNIX=y +CONFIG_INET=y +CONFIG_IP_MULTICAST=y +CONFIG_IP_PNP=y +CONFIG_IP_PNP_DHCP=y +CONFIG_IP_PNP_BOOTP=y +CONFIG_IP_PNP_RARP=y +# CONFIG_IPV6 is not set +CONFIG_NETFILTER=y +# CONFIG_WIRELESS is not set +CONFIG_UEVENT_HELPER=y +CONFIG_DEVTMPFS=y +CONFIG_DEVTMPFS_MOUNT=y +# CONFIG_STANDALONE is not set +CONFIG_BLK_DEV_LOOP=y +CONFIG_BLK_DEV_RAM=y +CONFIG_SCSI=y +CONFIG_BLK_DEV_SD=y +CONFIG_NETDEVICES=y +# CONFIG_NET_VENDOR_ARC is not set +# CONFIG_NET_VENDOR_AURORA is not set +# CONFIG_NET_VENDOR_BROADCOM is not set +# CONFIG_NET_VENDOR_INTEL is not set +# CONFIG_NET_VENDOR_MARVELL is not set +# CONFIG_NET_VENDOR_MICREL is not set +# CONFIG_NET_VENDOR_NATSEMI is not set +# CONFIG_NET_VENDOR_SAMSUNG is not set +# CONFIG_NET_VENDOR_SEEQ is not set +# CONFIG_NET_VENDOR_SMSC is not set +# CONFIG_NET_VENDOR_STMICRO is not set +# CONFIG_NET_VENDOR_VIA is not set +# CONFIG_NET_VENDOR_WIZNET is not set +CONFIG_MARVELL_PHY=y +# CONFIG_WLAN is not set +# CONFIG_INPUT_KEYBOARD is not set +# CONFIG_INPUT_MOUSE is not set +# CONFIG_SERIO is not set +CONFIG_DEVKMEM=y +CONFIG_SERIAL_8250=y +# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set +CONFIG_SERIAL_8250_CONSOLE=y +CONFIG_SERIAL_OF_PLATFORM=y +# CONFIG_HWMON is not set +CONFIG_WATCHDOG=y +CONFIG_WATCHDOG_NOWAYOUT=y +CONFIG_SOFT_WATCHDOG=y +# CONFIG_VGA_CONSOLE is not set +# CONFIG_USB_SUPPORT is not set +# CONFIG_IOMMU_SUPPORT is not set +CONFIG_EXT3_FS=y +CONFIG_FANOTIFY=y +CONFIG_VFAT_FS=y +CONFIG_PROC_KCORE=y +CONFIG_TMPFS=y +CONFIG_TMPFS_POSIX_ACL=y +CONFIG_NFS_FS=y +CONFIG_NFS_V4=y +CONFIG_NFS_SWAP=y +CONFIG_ROOT_NFS=y +CONFIG_SUNRPC_DEBUG=y +CONFIG_NLS_CODEPAGE_437=y +CONFIG_NLS_ISO8859_1=y +CONFIG_CRYPTO_ECHAINIV=y +CONFIG_CRYPTO_DEFLATE=y +CONFIG_CRYPTO_LZO=y +CONFIG_CRYPTO_ANSI_CPRNG=y +CONFIG_PRINTK_TIME=y +CONFIG_DYNAMIC_DEBUG=y +CONFIG_DEBUG_INFO=y +CONFIG_MAGIC_SYSRQ=y +CONFIG_DETECT_HUNG_TASK=y +# CONFIG_SCHED_DEBUG is not set +CONFIG_SCHEDSTATS=y +CONFIG_DEBUG_RT_MUTEXES=y +CONFIG_DEBUG_SPINLOCK=y +CONFIG_DEBUG_MUTEXES=y +CONFIG_DEBUG_ATOMIC_SLEEP=y +CONFIG_STACKTRACE=y +CONFIG_RCU_TRACE=y +# CONFIG_FTRACE is not set +# CONFIG_S32C1I_SELFTEST is not set diff --git a/arch/xtensa/include/asm/cache.h b/arch/xtensa/include/asm/cache.h index b21fd133ff62..54e147ac26bf 100644 --- a/arch/xtensa/include/asm/cache.h +++ b/arch/xtensa/include/asm/cache.h @@ -31,4 +31,10 @@ #define ARCH_DMA_MINALIGN L1_CACHE_BYTES +/* + * R/O after init is actually writable, it cannot go to .rodata + * according to vmlinux linker script. + */ +#define __ro_after_init __read_mostly + #endif /* _XTENSA_CACHE_H */ diff --git a/arch/xtensa/include/asm/page.h b/arch/xtensa/include/asm/page.h index 09c56cba442e..f4771c29c7e9 100644 --- a/arch/xtensa/include/asm/page.h +++ b/arch/xtensa/include/asm/page.h @@ -169,7 +169,18 @@ static inline unsigned long ___pa(unsigned long va) if (off >= XCHAL_KSEG_SIZE) off -= XCHAL_KSEG_SIZE; +#ifndef CONFIG_XIP_KERNEL return off + PHYS_OFFSET; +#else + if (off < XCHAL_KSEG_SIZE) + return off + PHYS_OFFSET; + + off -= XCHAL_KSEG_SIZE; + if (off >= XCHAL_KIO_SIZE) + off -= XCHAL_KIO_SIZE; + + return off + XCHAL_KIO_PADDR; +#endif } #define __pa(x) ___pa((unsigned long)(x)) #else diff --git a/arch/xtensa/include/asm/vectors.h b/arch/xtensa/include/asm/vectors.h index 4220c6dac44f..fd99b25037a7 100644 --- a/arch/xtensa/include/asm/vectors.h +++ b/arch/xtensa/include/asm/vectors.h @@ -22,9 +22,13 @@ #include <asm/kmem_layout.h> #if defined(CONFIG_MMU) && XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY +#ifdef CONFIG_KERNEL_VIRTUAL_ADDRESS +#define KERNELOFFSET CONFIG_KERNEL_VIRTUAL_ADDRESS +#else #define KERNELOFFSET (CONFIG_KERNEL_LOAD_ADDRESS + \ XCHAL_KSEG_CACHED_VADDR - \ XCHAL_KSEG_PADDR) +#endif #else #define KERNELOFFSET CONFIG_KERNEL_LOAD_ADDRESS #endif diff --git a/arch/xtensa/kernel/head.S b/arch/xtensa/kernel/head.S index 2cec13a457d7..e0c1fac0910f 100644 --- a/arch/xtensa/kernel/head.S +++ b/arch/xtensa/kernel/head.S @@ -260,6 +260,13 @@ ENTRY(_startup) ___invalidate_icache_all a2 a3 isync +#ifdef CONFIG_XIP_KERNEL + /* Setup bootstrap CPU stack in XIP kernel */ + + movi a1, start_info + l32i a1, a1, 0 +#endif + movi a6, 0 xsr a6, excsave1 diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c index e0e1e1892b86..0f93b67c7a5a 100644 --- a/arch/xtensa/kernel/setup.c +++ b/arch/xtensa/kernel/setup.c @@ -308,6 +308,10 @@ extern char _Level6InterruptVector_text_end; extern char _SecondaryResetVector_text_start; extern char _SecondaryResetVector_text_end; #endif +#ifdef CONFIG_XIP_KERNEL +extern char _xip_start[]; +extern char _xip_end[]; +#endif static inline int __init_memblock mem_reserve(unsigned long start, unsigned long end) @@ -339,6 +343,9 @@ void __init setup_arch(char **cmdline_p) #endif mem_reserve(__pa(_stext), __pa(_end)); +#ifdef CONFIG_XIP_KERNEL + mem_reserve(__pa(_xip_start), __pa(_xip_end)); +#endif #ifdef CONFIG_VECTORS_OFFSET mem_reserve(__pa(&_WindowVectors_text_start), diff --git a/arch/xtensa/kernel/vmlinux.lds.S b/arch/xtensa/kernel/vmlinux.lds.S index 943f10639a93..01e3112cdb27 100644 --- a/arch/xtensa/kernel/vmlinux.lds.S +++ b/arch/xtensa/kernel/vmlinux.lds.S @@ -134,6 +134,9 @@ SECTIONS NOTES /* Data section */ +#ifdef CONFIG_XIP_KERNEL + INIT_TEXT_SECTION(PAGE_SIZE) +#else _sdata = .; RW_DATA_SECTION(XCHAL_ICACHE_LINESIZE, PAGE_SIZE, THREAD_SIZE) _edata = .; @@ -147,6 +150,11 @@ SECTIONS .init.data : { INIT_DATA + } +#endif + + .init.rodata : + { . = ALIGN(0x4); __tagtable_begin = .; *(.taglist) @@ -187,12 +195,16 @@ SECTIONS RELOCATE_ENTRY(_DebugInterruptVector_text, .DebugInterruptVector.text); #endif +#ifdef CONFIG_XIP_KERNEL + RELOCATE_ENTRY(_xip_data, .data); + RELOCATE_ENTRY(_xip_init_data, .init.data); +#else #if defined(CONFIG_SMP) RELOCATE_ENTRY(_SecondaryResetVector_text, .SecondaryResetVector.text); #endif +#endif - __boot_reloc_table_end = ABSOLUTE(.) ; INIT_SETUP(XCHAL_ICACHE_LINESIZE) @@ -278,7 +290,7 @@ SECTIONS . = (LOADADDR( .DoubleExceptionVector.text ) + SIZEOF( .DoubleExceptionVector.text ) + 3) & ~ 3; #endif -#if defined(CONFIG_SMP) +#if !defined(CONFIG_XIP_KERNEL) && defined(CONFIG_SMP) SECTION_VECTOR (_SecondaryResetVector_text, .SecondaryResetVector.text, @@ -291,12 +303,48 @@ SECTIONS . = ALIGN(PAGE_SIZE); +#ifndef CONFIG_XIP_KERNEL __init_end = .; BSS_SECTION(0, 8192, 0) +#endif _end = .; +#ifdef CONFIG_XIP_KERNEL + . = CONFIG_XIP_DATA_ADDR; + + _xip_start = .; + +#undef LOAD_OFFSET +#define LOAD_OFFSET \ + (CONFIG_XIP_DATA_ADDR - (LOADADDR(.dummy) + SIZEOF(.dummy) + 3) & ~ 3) + + _xip_data_start = .; + _sdata = .; + RW_DATA_SECTION(XCHAL_ICACHE_LINESIZE, PAGE_SIZE, THREAD_SIZE) + _edata = .; + _xip_data_end = .; + + /* Initialization data: */ + + STRUCT_ALIGN(); + + _xip_init_data_start = .; + __init_begin = .; + .init.data : + { + INIT_DATA + } + _xip_init_data_end = .; + __init_end = .; + BSS_SECTION(0, 8192, 0) + + _xip_end = .; + +#undef LOAD_OFFSET +#endif + DWARF_DEBUG .xt.prop 0 : { KEEP(*(.xt.prop .xt.prop.* .gnu.linkonce.prop.*)) } |