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| author | Florian Fainelli <f.fainelli@gmail.com> | 2017-08-29 20:03:39 +0200 |
|---|---|---|
| committer | Florian Fainelli <f.fainelli@gmail.com> | 2017-09-25 20:56:04 +0200 |
| commit | c14963521502b237a6817aceda6f3379296db75c (patch) | |
| tree | 0f0be2a8ce40c9eff76a7226af8ab160b4ca87ef /arch/arm/include | |
| parent | Merge tag 'bcm2835-soc-next-2017-08-24' into soc/next (diff) | |
| download | linux-c14963521502b237a6817aceda6f3379296db75c.tar.xz linux-c14963521502b237a6817aceda6f3379296db75c.zip | |
ARM: brcmstb: Add appropriate ARM_BE8() macros for swapping
Building a big-endian kernel for ARCH_BRCMSTB revealed that we would not
be correctly polling for the right bit in the busyuart macro, turns out
there are a few transformations needed to work with big-endian kernels.
First we need to swap the value we read from SUN_TOP_CTRL to properly
compare it against our local tables. Then, just like 8250.S we need to
swap the value before storing it, and conversely swap it after a load.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/debug/brcmstb.S | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/include/debug/brcmstb.S b/arch/arm/include/debug/brcmstb.S index 52aaed2b936f..c826f15d2f80 100644 --- a/arch/arm/include/debug/brcmstb.S +++ b/arch/arm/include/debug/brcmstb.S @@ -58,6 +58,7 @@ /* Check SUN_TOP_CTRL base */ ldr \rp, =SUN_TOP_CTRL_BASE @ load SUN_TOP_CTRL PA ldr \rv, [\rp, #0] @ get register contents +ARM_BE8( rev \rv, \rv ) and \rv, \rv, #0xffffff00 @ strip revision bits [7:0] /* Chip specific detection starts here */ @@ -98,11 +99,13 @@ .endm .macro store, rd, rx:vararg +ARM_BE8( rev \rd, \rd ) str \rd, \rx .endm .macro load, rd, rx:vararg ldr \rd, \rx +ARM_BE8( rev \rd, \rd ) .endm .macro senduart,rd,rx |