diff options
| 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-orion5x | |
| parent | ce78179ea6e042e2d3af0a1c71c105431ead483a (diff) | |
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-orion5x')
| -rw-r--r-- | arch/arm/mach-orion5x/orion5x.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm/mach-orion5x/orion5x.h b/arch/arm/mach-orion5x/orion5x.h index 3364df331f01..2b66120fba86 100644 --- a/arch/arm/mach-orion5x/orion5x.h +++ b/arch/arm/mach-orion5x/orion5x.h @@ -31,13 +31,13 @@ * fc000000 device bus mappings (cs0/cs1) * * virt phys size - * fe000000 f1000000 1M on-chip peripheral registers + * fec00000 f1000000 1M on-chip peripheral registers * fee00000 f2000000 64K PCIe I/O space * fee10000 f2100000 64K PCI I/O space * fd000000 f0000000 16M PCIe WA space (Orion-1/Orion-NAS only) ****************************************************************************/ #define ORION5X_REGS_PHYS_BASE 0xf1000000 -#define ORION5X_REGS_VIRT_BASE IOMEM(0xfe000000) +#define ORION5X_REGS_VIRT_BASE IOMEM(0xfec00000) #define ORION5X_REGS_SIZE SZ_1M #define ORION5X_PCIE_IO_PHYS_BASE 0xf2000000 |