[U-Boot-Users] C function call in Linux kernel
young726 at hotmail.com
Sat Jul 10 00:46:34 CEST 2004
>In message <BAY2-F35dSZwnUdfnuz000953d6 at hotmail.com> you wrote:
> > >How do you know that? And what exactly means "stuck" in this context?
> > I put the following piece of code in head_4xx.S:
> > early_init is the c functional. From the console I can see '1' but no
> > which is expected after early_init is done.
>What you write is true, although you didn't mean it:
>It is indeed expected that you don't see '2', because your code just
>crashes the system.
Really!? I didn't realize this!! Could you give some more detail? Why the
code could crash the system? In order to use the UART, I also added a TLB
entry as below:
/* Set up a TLB for UART controller */
lis r3, UART0_BASE at h
addi r3, r3, UART0_BASE at l
ori r4, r3, 0
clrrwi r4, r4, 10
ori r4, r4, (TLB_WR | TLB_EX | TLB_I | TLB_G)
clrrwi r3,r3,10 /* Mask off the effective page number */
ori r3,r3,(TLB_VALID | TLB_PAGESZ(PAGESZ_4K))
li r0, 11
tlbwe r4, r0, TLB_DATA
tlbwe r3, r0, TLB_TAG
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