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| author | Arnd Bergmann <arnd@arndb.de> | 2019-07-31 21:56:55 +0200 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2019-08-14 19:24:58 +0200 |
| commit | 3584be9ec3bfe2c12bcb40da13fa185d237bff7d (patch) | |
| tree | b6aedbac190e324bb1faf65e5fc9c94531df78df /arch/arm/mach-mv78xx0 | |
| parent | ARM: dove: clean up mach/*.h headers (diff) | |
| download | linux-3584be9ec3bfe2c12bcb40da13fa185d237bff7d.tar.xz linux-3584be9ec3bfe2c12bcb40da13fa185d237bff7d.zip | |
ARM: orion/mvebu: unify debug-ll virtual addresses
In a multiplatform configuration, enabling DEBUG_LL breaks booting
on all platforms with incompatible settings. In case of the Marvell
platforms of the Orion/MVEBU family, the physical addresses are
all the same, we just map them at different virtual addresses,
which makes it impossible to run a kernel with DEBUG_LL enabled on
a combination of the merged mvebu and the legacy boardfile based
platforms.
This is easily solved by using the same virtual address everywhere.
I picked the address that is already used by mach-mvebu for UART0:
0xfec12000. All these platforms have a 1MB region with their internal
registers, almost always at physical address 0xf1000000, so I'm
updating the iotable for that entry.
In case of mach-dove, this is slightly trickier, as the existing
mapping is 8MB and a second 8MB mapping is already at the 0xfec00000
address. I have verified from the datasheet that the last 7MB of the
physical mapping are "reserved" and nothing in Linux tries to use
it either. I'm putting this 1MB mapping at the same address as the
others, and the second 8MB register area immediately before that.
Link: https://lore.kernel.org/r/20190731195713.3150463-14-arnd@arndb.de
Link: https://lore.kernel.org/linux-arm-kernel/87si3eb1z8.fsf@free-electrons.com/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm/mach-mv78xx0')
| -rw-r--r-- | arch/arm/mach-mv78xx0/mv78xx0.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm/mach-mv78xx0/mv78xx0.h b/arch/arm/mach-mv78xx0/mv78xx0.h index 2db1265ec121..c1a9a1d1b295 100644 --- a/arch/arm/mach-mv78xx0/mv78xx0.h +++ b/arch/arm/mach-mv78xx0/mv78xx0.h @@ -37,7 +37,7 @@ * fee50000 f0d00000 64K PCIe #5 I/O space * fee60000 f0e00000 64K PCIe #6 I/O space * fee70000 f0f00000 64K PCIe #7 I/O space - * fd000000 f1000000 1M on-chip peripheral registers + * fec00000 f1000000 1M on-chip peripheral registers */ #define MV78XX0_CORE0_REGS_PHYS_BASE 0xf1020000 #define MV78XX0_CORE1_REGS_PHYS_BASE 0xf1024000 @@ -49,7 +49,7 @@ #define MV78XX0_PCIE_IO_SIZE SZ_1M #define MV78XX0_REGS_PHYS_BASE 0xf1000000 -#define MV78XX0_REGS_VIRT_BASE IOMEM(0xfd000000) +#define MV78XX0_REGS_VIRT_BASE IOMEM(0xfec00000) #define MV78XX0_REGS_SIZE SZ_1M #define MV78XX0_PCIE_MEM_PHYS_BASE 0xc0000000 |