u-boot.git/arch/arm/lib/cache.c, branch v2020.07

common: Drop log.h from common header

2020-05-19T01:19:18Z

Move this header out of the common header. Signed-off-by: Simon Glass

common: Drop net.h from common header

2020-05-18T21:33:31Z

Move this header out of the common header. Network support is used in quite a few places but it still does not warrant blanket inclusion. Note that this net.h header itself has quite a lot in it. It could be split into the driver-mode support, functions, structures, checksumming, etc. Signed-off-by: Simon Glass

cmd: cache: Fix non-cached memory cachability

2020-05-07T13:01:42Z

If dcache is switched OFF to ON state and if non-cached memory is used, this non-cached memory must be re-declared as uncached to mmu each time dcache is set ON. Introduce noncached_set_region() to set this non-cached region's mmu settings. Let architecture override it by defining it as a weak function. For ARM architecture, noncached_set_region() defines all noncached region as non-cacheable. Issue found on STM32MP1 platform using dwc_eth_qos ethernet driver, when going from dcache OFF to dcache ON state, ethernet driver issued TX timeout errors when performing dhcp or ping. It can be reproduced with the following sequence: dhcp while true ; do ping 192.168.1.300 ; dcache off ; ping 192.168.1.300 ; dcache on ; done Signed-off-by: Patrice Chotard Cc: Marek Vasut Cc: Joe Hershberger Cc: Ramon Fried Cc: Stephen Warren Reviewed-by: Marek Vasut

common/board_f: Make reserve_mmu generic

2020-04-24T19:17:14Z

Introduce arch_reserve_mmu to allow for architecture-specific reserve_mmu routines. Also, define a weak nop stub for it. Signed-off-by: Ovidiu Panait Reviewed-by: Simon Glass

arm: asm/cache.c: Introduce arm_reserve_mmu

2020-04-24T19:17:14Z

As a preparation for turning reserve_mmu into an arch-specific variant, introduce arm_reserve_mmu on ARM. It implements the default routine for reserving memory for MMU TLB and needs to be weakly defined in order to allow for machines to override it. Without this decoupling, after introducing arch_reserve_mmu, there would be two weak definitions for it, one in common/board_f.c and one in arch/arm/lib/cache.c. Signed-off-by: Ovidiu Panait Reviewed-by: Simon Glass

common/board_f: Move arm-specific reserve_mmu to arch/arm/lib/cache.c

2020-04-24T19:17:14Z

Move the ARM-specific reserve_mmu definition from common/board_f.c to arch/arm/lib/cache.c. Signed-off-by: Ovidiu Panait Reviewed-by: Simon Glass

common: Move ARM cache operations out of common.h

2019-12-02T23:24:58Z

These functions are CPU-related and do not use driver model. Move them to cpu_func.h Signed-off-by: Simon Glass Reviewed-by: Daniel Schwierzeck Reviewed-by: Tom Rini

board_f: fix noncached reservation calculation

2019-08-30T18:17:11Z

The current code in reserve_noncached() has two issues: 1) The first update of gd->start_addr_sp always rounds down to a section start. However, the equivalent calculation in cache.c:noncached_init() always first rounds up to a section start, then subtracts a section size. These two calculations differ if the initial value is already rounded to section alignment. 2) The second update of gd->start_addr_sp subtracts exactly CONFIG_SYS_NONCACHED_MEMORY, whereas the equivalent calculation in cache.c:noncached_init() rounds the noncached size up to section alignment before subtracting it. The two calculations differ if the noncached region size is not a multiple of the MMU section size. In practice, one/both of those issues causes a practical problem on Jetson TX1; U-Boot triggers a synchronous abort during initialization, likely due to overlapping use of some memory region. This change fixes both these issues by duplicating the exact calculations from noncached_init() into reserve_noncached(). However, this fix assumes that gd->start_addr_sp on entry to reserve_noncached() exactly matches mem_malloc_start on entry to noncached_init(). I haven't traced the code to see whether it absolutely guarantees this in all (or indeed any!) cases. Consequently, I added some comments in the hope that this condition will continue to be true. Fixes: 5f7adb5b1c02 ("board_f: reserve noncached space below malloc area") Cc: Vikas Manocha Signed-off-by: Stephen Warren

CONFIG_SPL_SYS_[DI]CACHE_OFF: add

2019-05-18T12:15:35Z

While converting CONFIG_SYS_[DI]CACHE_OFF to Kconfig, there are instances where these configuration items are conditional on SPL. This commit adds SPL variants of these configuration items, uses CONFIG_IS_ENABLED(), and updates the configurations as required. Acked-by: Alexey Brodkin Signed-off-by: Trevor Woerner [trini: Make the default depend on the setting for full U-Boot, update more zynq hardware] Signed-off-by: Tom Rini

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