u-boot.git/arch/mips/include/asm/io.h, branch v2020.07

mips: Implement {in, out}_{le, be}_{16, 32, 64} and {in, out}_8

2018-11-14T17:16:27Z

MIPS is the only architecture currently supported by U-Boot that does not implement any of the in/out register access functions. To have a interface that is useable across architectures, add the functions to the MIPS architecture (implemented using the __raw_write and __raw_read functions). Reviewed-by: Simon Glass Reviewed-by: Stefan Roese Reviewed-by: Daniel Schwierzeck Signed-off-by: Mario Six

SPDX: Convert all of our single license tags to Linux Kernel style

2018-05-07T13:34:12Z

When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini

mips: Use asm-generic/io.h

2017-10-03T01:52:23Z

Convert the mips architecture to make use of the new asm-generic/io.h to provide address mapping functions. As mips actually performs non-identity mapping between physical & virtual addresses we can't simply make use of the generic functions, with the exception of being able to drop our no-op unmap_physmem() and definitions of unused map flags. Signed-off-by: Paul Burton Cc: Daniel Schwierzeck Reviewed-by: Daniel Schwierzeck Acked-by: Daniel Schwierzeck

MIPS: Fix map_physmem for cached mappings

2016-11-30T15:18:19Z

map_physmem should return a pointer that can be used by the CPU to access the given memory - on MIPS simply returning the physical address as it does prior to this patch doesn't achieve that. Instead return a pointer to the memory within (c)kseg0, which matches up consistently with the (c)kseg1 pointer that uncached mappings return via ioremap. Signed-off-by: Paul Burton

MIPS: Use CPHYSADDR to implement mips32 virt_to_phys

2016-05-31T07:38:11Z

Use CPHYSADDR to implement the virt_to_phys function for converting from a virtual to a physical address for MIPS32, much as is already done for MIPS64. This allows for virt_to_phys to work regardless of whether the address being translated is in kseg0 or kseg1, unlike the previous subtraction based approach which only worked for addresses in kseg0. This allows for drivers to provide an address to virt_to_phys without needing to manually ensure that kseg1 addresses are converted to equivalent kseg0 addresses first. This patch is equivalent to this Linux patch currently waiting to be reviewed & merged: https://patchwork.linux-mips.org/patch/12564/ Signed-off-by: Paul Burton

MIPS: Support dynamic I/O port base address

2016-02-01T21:13:25Z

The existing mips_io_port_base variable isn't suitable for use early during boot since it will be stored in the .data section which may not be writable pre-relocation. Fix this by moving the I/O port base address into struct arch_global_data. In order to avoid adding this field for all targets, make this dependant upon a new Kconfig entry CONFIG_DYNAMIC_IO_PORT_BASE. Malta is the only board which sets a non-zero I/O port base, so select this option only for Malta. Signed-off-by: Paul Burton

MIPS: Remove SLOW_DOWN_IO

2016-02-01T21:13:25Z

CONF_SLOWDOWN_IO is never set for any target, so remove the dead code in the SLOW_DOWN_IO macro. This is done in preparation for changes to mips_io_port_base which can be avoided in this path by removing it entirely. Signed-off-by: Paul Burton

mips: asm/io.h: Add in

2016-01-25T23:52:23Z

As part of the bug.h / BUILD_BUG_* clean up, this file was missed. Signed-off-by: Tom Rini

MIPS: implement bit manipulating I/O accessors

2016-01-16T20:06:46Z

Add support for functions clrbits_X(), setbits_X() and clrsetbits_X() on MIPS. Signed-off-by: Daniel Schwierzeck

MIPS: sync I/O related header files with linux-4.4

2016-01-16T20:06:46Z

Mainly sync asm/io.h to get a working ioremap() implementation as well as the full set of I/O accessors. Pull in additional header files to make this work. Furthermore port over the directory 'arch/mips/include/asm/mach-generic/' with contains default definitions for I/O and memory spaces and default implementations for mapping those spaces. All files in that directory can be overwritten by a SoC/machine. Signed-off-by: Daniel Schwierzeck