u-boot/arch
Patrice Chotard c2a2123e33 cmd: cache: Fix non-cached memory cachability
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 <patrice.chotard@st.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Ramon Fried <rfried.dev@gmail.com>
Cc: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Marek Vasut <marex@denx.de>
2020-05-07 09:01:42 -04:00
..
arc ARC: AXS10x: cleanup kconfig 2020-04-27 15:04:42 +03:00
arm cmd: cache: Fix non-cached memory cachability 2020-05-07 09:01:42 -04:00
m68k kconfig / kbuild: Re-sync with Linux 4.19 2020-04-10 11:18:32 -04:00
microblaze Kconfig: Remove redundant variable sets 2020-03-16 16:42:50 -04:00
mips mips: Add support for SoM "VoCore2". 2020-04-27 20:30:14 +02:00
nds32 dma-mapping: move dma_map_(un)single() to <linux/dma-mapping.h> 2020-02-19 21:27:30 +08:00
nios2 common: Move hang() to the same header as panic() 2020-01-24 23:06:49 +05:30
powerpc powerpc: dts: p1010: add i2c node 2020-05-04 09:12:37 +05:30
riscv sifive: fu540: Enable spi-nor flash support 2020-04-30 22:34:20 +05:30
sandbox test: dm: phy: add a test item for the phy_bulk API 2020-05-02 12:32:28 +02:00
sh dma-mapping: add <asm/dma-mapping.h> for all architectures 2020-02-20 15:09:54 +08:00
x86 x86: coreboot: Allow building an SPL image 2020-05-04 15:28:28 +08:00
xtensa dma-mapping: add <asm/dma-mapping.h> for all architectures 2020-02-20 15:09:54 +08:00
.gitignore
Kconfig sandbox: implement ft_board_setup() 2020-04-16 08:07:58 -06:00
u-boot-elf.lds arch: Add explicit linker script for u-boot-elf 2020-04-03 11:52:55 -04:00