In both arm ADIv5 and ADIv6 documentation, for both Class 0x1 and
Class 0x9 ROM tables, the offset field from ROM tables is supposed
to be a signed value: "Negative values of OFFSET are permitted,
using two’s complement."
The commit ac22cdc573 ("target/adiv5: Large Physical Address
Extension") extends to 64 bits the addresses while managing the ROM
tables. The offset is read as unsigned and in the former 32 bits
implementation the wrap-around was hiding the need for converting
the offset to signed. The new implementation requires the proper
cast to the offset.
On a STM32F411, without this fix the ROM table dump is incorrectly
reporting addresses out of the 32 bit bus range:
MEM-AP BASE 0xe00ff003
Valid ROM table present
Component base address 0xe00ff000
Peripheral ID 0x00000a0411
Designer is 0x0a0, STMicroelectronics
Part is 0x411, Unrecognized
Component class is 0x1, ROM table
MEMTYPE system memory present on bus
ROMTABLE[0x0] = 0xfff0f003
Component base address 0x1e000e000
^^^^^^^^^^^
Cast the offset before adding it to the base address of the ROM
table.
Change-Id: I8d31fd2b3d657286cb96f8e22fb00842baa728f7
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Fixes: ac22cdc573 ("target/adiv5: Large Physical Address Extension")
Reviewed-on: http://openocd.zylin.com/6410
Tested-by: jenkins
Reviewed-by: Daniel Goehring <dgoehrin@os.amperecomputing.com>
2f97856c5b