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* MIPS: lib/Makefile: fix whitespacesAntony Pavlov2019-06-201-2/+2
| | | | | Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* MIPS: relocation: add relocation supportOleksij Rempel2019-04-231-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | this patch i a port of following patch from u-boot with some additional integration changes and fixes of original code: | Subject: [PATCH] MIPS: Stop building position independent code | | U-Boot has up until now built with -fpic for the MIPS architecture, | producing position independent code which uses indirection through a | global offset table, making relocation fairly straightforward as it | simply involves patching up GOT entries. | | Using -fpic does however have some downsides. The biggest of these is | that generated code is bloated in various ways. For example, function | calls are indirected through the GOT & the t9 register: | | 8f998064 lw t9,-32668(gp) | 0320f809 jalr t9 | | Without -fpic the call is simply: | | 0f803f01 jal be00fc04 <puts> | | This is more compact & faster (due to the lack of the load & the | dependency the jump has on its result). It is also easier to read & | debug because the disassembly shows what function is being called, | rather than just an offset from gp which would then have to be looked up | in the ELF to discover the target function. | | Another disadvantage of -fpic is that each function begins with a | sequence to calculate the value of the gp register, for example: | | 3c1c0004 lui gp,0x4 | 279c3384 addiu gp,gp,13188 | 0399e021 addu gp,gp,t9 | | Without using -fpic this sequence no longer appears at the start of each | function, reducing code size considerably. | | This patch switches U-Boot from building with -fpic to building with | -fno-pic, in order to gain the benefits described above. The cost of | this is an extra step during the build process to extract relocation | data from the ELF & write it into a new .rel section in a compact | format, plus the added complexity of dealing with multiple types of | relocation rather than the single type that applied to the GOT. The | benefit is smaller, cleaner, more debuggable code. The relocate_code() | function is reimplemented in C to handle the new relocation scheme, | which also makes it easier to read & debug. | | Taking maltael_defconfig as an example the size of u-boot.bin built | using the Codescape MIPS 2016.05-06 toolchain (gcc 4.9.2, binutils | 2.24.90) shrinks from 254KiB to 224KiB. | | Signed-off-by: Paul Burton <paul.burton@imgtec.com> Signed-off-by: Oleksij Rempel <linux@rempel-privat.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* MIPS: ath79: add spi and sram bootstrap helpersOleksij Rempel2019-01-241-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | At least some ath79 SoC have build in 32K RAM. It allow us to use lowlevel portion of barebox to bootstrap the system by using JTAG debugger (For example OpenOCD). Since ath79 has no reliable way to stop the CPU execution before reading SPI Flash, this can cause different issues. To avoid it, we need to flash a execution trap with software debug breakpoint to the flash. The workflow should be as follow: - After power on or reset the CPU will start execution of SPI flash. As soon as software debug breakpoint is executed, CPU will halt and notify OpenOCD about breakpoint event. - OpenOCD will load reduced barebox to SRAM and execute it. This part will do all needed low level initialization - PLL, RAM and trigger second breakpoint event. - OpenOCD will load full barebox version to the main RAM and start execution. It can be used for bring-up, so no regular flashing is needed. Signed-off-by: Oleksij Rempel <linux@rempel-privat.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* MIPS: Use generic GCC library routines from lib/Antony Pavlov2018-06-291-5/+0
| | | | | | | | | | | | | This is a port of Linux kernel commit | commit 740129b36faf049e6845819144542a0455e1e285 | Author: Antony Pavlov <antonynpavlov@gmail.com> | Date: Wed Apr 11 08:50:19 2018 +0100 | | MIPS: Use generic GCC library routines from lib/ Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* MIPS: implement dma_sync_* functionsPeter Mamonov2016-03-091-0/+1
| | | | | | Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Peter Mamonov <pmamonov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* MIPS: flush cache on shutdownAntony Pavlov2016-03-091-0/+1
| | | | | | Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Peter Mamonov <pmamonov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* MIPS: import optimized string functions from LinuxAleksey Kuleshov2015-11-261-0/+3
| | | | | | | | | 10x performance gain according to simple test on QEMU malta: barebox:/ time memcpy 0xa0000000 0xa0001000 0x100000 Signed-off-by: Aleksey Kuleshov <rndfax@yandex.ru> Acked-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* MIPS: PBL: Add missing pieces for xz compressed PBL imageAntony Pavlov2015-09-211-0/+2
| | | | | | | Also ignore piggy.shipped binary (CONFIG_IMAGE_COMPRESSION_NONE=y). Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* mips: initialize malloc pool before start_barebox()Sascha Hauer2013-03-141-1/+0
| | | | Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* MIPS: add initial exceptions handlingAntony Pavlov2012-07-271-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | Checking exception handling: $ make qemu-malta_defconfig $ make ... $ qemu-system-mips -nodefaults -M malta -m 256 \ -nographic -serial stdio -bios ./barebox.bin ... barebox:/ md -l 0x03 Ooops, address error on load or ifetch! EPC = 0xa082783c CP0_STATUS = 0x00000006 CP0_CAUSE = 0x00000410 CP0_CONFIG = 0x80008482 ### ERROR ### Please RESET the board ### Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* MIPS: import CPU and cache detection code from Linux 3.4Antony Pavlov2012-05-231-0/+4
| | | | | | Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* MIPS: bootm: add "MIPS barebox" handlerAntony Pavlov2012-05-111-0/+1
| | | | | Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* MIPS: add draft cpuinfo commandAntony Pavlov2011-08-051-0/+2
| | | | | Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* MIPS: add common MIPS stuffAntony Pavlov2011-08-051-0/+6
Add start.S, CP0 clocksource, Makefile, linker script and memory layout function. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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