Den 17.12.2015 00:55, skrev Eric Anholt:
This should be a complete port of bcm2835 functionality to bcm2836
(Raspberry Pi 2).
Signed-off-by: Eric Anholt <eric@xxxxxxxxxx>
---
v2: Implement Arnd's feedback to not split to ARCH_BCM2836, and
instead use more conditionals in ARCH_BCM2835. Also reduce diff
between 2835 and 2836.
arch/arm/Kconfig.debug | 10 ++++++++--
arch/arm/boot/dts/Makefile | 3 ++-
arch/arm/mach-bcm/Kconfig | 8 ++++----
3 files changed, 14 insertions(+), 7 deletions(-)
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 259c0ca..957b876 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -143,7 +143,12 @@ choice
config DEBUG_BCM2835
bool "Kernel low-level debugging on BCM2835 PL011 UART"
- depends on ARCH_BCM2835
+ depends on ARCH_BCM2835 && ARCH_MULTI_V6
+ select DEBUG_UART_PL01X
+
+ config DEBUG_BCM2836
+ bool "Kernel low-level debugging on BCM2836 PL011 UART"
+ depends on ARCH_BCM2835 && ARCH_MULTI_V7
select DEBUG_UART_PL01X
config DEBUG_BCM_5301X
@@ -1402,6 +1407,7 @@ config DEBUG_UART_PHYS
default 0x20064000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
default 0x20068000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
default 0x20201000 if DEBUG_BCM2835
+ default 0x3f201000 if DEBUG_BCM2836
default 0x3e000000 if DEBUG_BCM_KONA_UART
default 0x4000e400 if DEBUG_LL_UART_EFM32
default 0x40081000 if DEBUG_LPC18XX_UART0
@@ -1485,7 +1491,7 @@ config DEBUG_UART_VIRT
default 0xf0000be0 if ARCH_EBSA110
default 0xf0010000 if DEBUG_ASM9260_UART
default 0xf01fb000 if DEBUG_NOMADIK_UART
- default 0xf0201000 if DEBUG_BCM2835
+ default 0xf0201000 if DEBUG_BCM2835 || DEBUG_BCM2836
This results in a BUG on Pi2 (bcm2836) because the address ends up in the
8MB VMALLOC_OFFSET "hole" between lowmem and vmalloc:
BUG: mapping for 0x3f201000 at 0xf0201000 out of vmalloc space
...
vmalloc : 0xf0800000 - 0xff800000 ( 240 MB)
lowmem : 0xc0000000 - 0xf0000000 ( 768 MB)
Moving the address a bit should work for both (tested on 2836):
default 0xf1201000 if DEBUG_BCM2835 || DEBUG_BCM2836
For reference this is the default memory configuration on Pi1 (bcm2835):
vmalloc : 0xdc800000 - 0xff800000 ( 560 MB)
lowmem : 0xc0000000 - 0xdc000000 ( 448 MB)
Noralf.
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