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* arm: semihosting: get rid of forward declarationsLinus Walleij2014-12-29-89/+84
| | | | | | | | | | | | | | By rearranging the functions in the semihosting code we can avoid forward-declaration of the internal static functions. This puts the stuff in a logical order: read/open/close/len and then higher-order functions follow at the end. Cc: Darwin Rambo <drambo@broadcom.com> Cc: AKASHI Takahiro <takahiro.akashi@linaro.org> Cc: Mark Hambleton <mark.hambleton@arm.com> Cc: Tom Rini <trini@ti.com> Acked-by: Steve Rae <srae@broadcom.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* arm: semihosting: fix up compile bugsLinus Walleij2014-12-29-49/+52
| | | | | | | | | | | | | | | | | | | | There is currently a regression when using newer ARM64 compilers for semihosting: the way long types are inferred from context is no longer the same. The semihosting runtime uses long and size_t, so use this explicitly in the semihosting code and interface, and voila: the code now works again. Tested with aarch64-linux-gnu-gcc: Linaro GCC 4.9-2014.09. Cc: Darwin Rambo <drambo@broadcom.com> Cc: AKASHI Takahiro <takahiro.akashi@linaro.org> Cc: Mark Hambleton <mark.hambleton@arm.com> Cc: Tom Rini <trini@ti.com> Acked-by: Steve Rae <srae@broadcom.com> Suggested-by: Mark Hambleton <mark.hambleton@arm.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* arm: semihosting: staticize internal functionsLinus Walleij2014-12-29-4/+9
| | | | | | | | | | | | | | | | | | | | | | | | | The semihosting code exposes internal file handle handling functions to read(), open(), close() and get the length of a certain file handle. However the code using it is only interested in either reading and entire named file into memory or getting the file length of a file referred by name. No file handles are used. Thus make the file handle code internal to this file by removing these functions from the semihosting header file and staticize them. This gives us some freedom to rearrange the semihosting code without affecting the external interface. Cc: Darwin Rambo <drambo@broadcom.com> Cc: AKASHI Takahiro <takahiro.akashi@linaro.org> Cc: Mark Hambleton <mark.hambleton@arm.com> Cc: Tom Rini <trini@ti.com> Acked-by: Steve Rae <srae@broadcom.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* arm: Add support for semihosting for armv8 fastmodel targets.Darwin Rambo2014-07-03-0/+233
The armv8 ARM Trusted Firmware (ATF) can be used to load various ATF images and u-boot, and does this for virtual platforms by using semihosting. This commit extends this idea by allowing u-boot to also use semihosting to load the kernel/ramdisk/dtb. This eliminates the need for a bootwrapper and produces a more realistic boot sequence with virtual models. Though the semihosting code is quite generic, support for armv7 in fastmodel is less useful due to the wide range of available silicon and the lack of a free armv7 fastmodel, so this change contains an untested armv7 placeholder for the service trap opcode. Please refer to doc/README.semihosting for a more detailed description of semihosting and how it is used with the armv8 virtual platforms. Signed-off-by: Darwin Rambo <drambo@broadcom.com> Cc: trini@ti.com Cc: fenghua@phytium.com.cn Cc: bhupesh.sharma@freescale.com