Hello,
How can i read back (or write) for example, the FPGA registers from the
walnut board (at @OxFO300000) with abatron.
I can read this memory area just after the ioremap operation (in
walnut.c) when the entry for 0XF0300000 is present
in the TLB without any problem (0xF0300000 -> 0xF0300000). With the
abatron debugger, i should be able to read any virtual adress, even if
this adress is not present in the TLB. Am i right ? Any suggestion ?
Thanks.
I'am using the latest version of bdiGdb (1.07), with the folllowing
config file :
[INIT]
; Setup MMU info
WM32 0x000000f4 0x00000000 ;invalidate kernel page table base
WM32 0x000000f8 0x00000000 ;invalidate process page table base
WM32 0x000000f0 0xc00000f4 ;invalidate page table base
[TARGET]
MMU XLAT 0xC0000000 ;enable virtual address mode
PTBASE 0x000000f0 ;address where kernel/user stores
pointer to page table
the hhl 2.0 from monta vista with the following head_4xx.S
/* Add helper information for the Abatron bdiGDB debugger.
*/
lis r5, abatron_pteptrs at ha
ori r5, r5, abatron_pteptrs at l
stw r5, 0xf0(r0) /* This much match your Abatron config */
lis r6, swapper_pg_dir at h
ori r6, r6, swapper_pg_dir at l
tophys(r5, r5)
stw r6, 0(r5)
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