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/Kconfig.debug | |
| 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/Kconfig.debug')
| -rw-r--r-- | arch/arm/Kconfig.debug | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index a4447f21bb25..96a8a1973fa3 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -1760,10 +1760,7 @@ config DEBUG_UART_VIRT default 0xfc705000 if DEBUG_ZTE_ZX default 0xfcfe8600 if DEBUG_BCM63XX_UART default 0xfd000000 if DEBUG_SPEAR3XX || DEBUG_SPEAR13XX - default 0xfd012000 if DEBUG_MVEBU_UART0_ALTERNATE && ARCH_MV78XX0 default 0xfd883000 if DEBUG_ALPINE_UART0 - default 0xfde12000 if DEBUG_MVEBU_UART0_ALTERNATE && ARCH_DOVE - default 0xfe012000 if DEBUG_MVEBU_UART0_ALTERNATE && ARCH_ORION5X default 0xfe017000 if DEBUG_MMP_UART2 default 0xfe018000 if DEBUG_MMP_UART3 default 0xfe100000 if DEBUG_IMX23_UART || DEBUG_IMX28_UART @@ -1778,7 +1775,7 @@ config DEBUG_UART_VIRT default 0xfec02000 if DEBUG_SOCFPGA_UART0 default 0xfec02100 if DEBUG_SOCFPGA_ARRIA10_UART1 default 0xfec03000 if DEBUG_SOCFPGA_CYCLONE5_UART1 - default 0xfec12000 if (DEBUG_MVEBU_UART0 || DEBUG_MVEBU_UART0_ALTERNATE) && ARCH_MVEBU + default 0xfec12000 if DEBUG_MVEBU_UART0 || DEBUG_MVEBU_UART0_ALTERNATE default 0xfec12100 if DEBUG_MVEBU_UART1_ALTERNATE default 0xfec10000 if DEBUG_SIRFATLAS7_UART0 default 0xfec20000 if DEBUG_DAVINCI_DMx_UART0 |