Re: [PATCH 5/6] MN10300: Add the MN10300/AM33 architecture to the kernel [try #5]

Alan Cox <[email protected]> wrote:

> > Some are part of the CPU core and affect things like CPU core itself, CPU
> > caches, MMU/TLB and exceptions/interrupts.  Others are on-silicon devices
> > such as the serial ports, the bus controller, the SDRAM controller.
> 
> How are they addressed - as CPU registers or as memory/IO space ?

Well, they're all accessed as memory locations within a special range of
addresses (all of 0xCxxxxxxx and 0xDxxxxxxx).  This includes the magic CPU
registers.  This is hard coded by the CPU before the MMU gets its hands on the
addresses, AFAIK.

I also wondered what about the boot wrapper (the kernel decompressor):  Is that
permitted to use readb() and co?

David
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• References:
  • Re: [PATCH 5/6] MN10300: Add the MN10300/AM33 architecture to the kernel [try #5]
    • From: Alan Cox <[email protected]>
  • Re: [PATCH 5/6] MN10300: Add the MN10300/AM33 architecture to the kernel [try #5]
    • From: Alan Cox <[email protected]>
  • Re: [PATCH 5/6] MN10300: Add the MN10300/AM33 architecture to the kernel [try #5]
    • From: Alan Cox <[email protected]>
  • Re: [PATCH 5/6] MN10300: Add the MN10300/AM33 architecture to the kernel [try #5]
    • From: Andrew Morton <[email protected]>
  • [PATCH 0/6] MN10300: Add the MN10300 architecture to Linux kernel [try #5]
    • From: David Howells <[email protected]>
  • Re: [PATCH 5/6] MN10300: Add the MN10300/AM33 architecture to the kernel [try #5]
    • From: David Howells <[email protected]>
  • Re: [PATCH 5/6] MN10300: Add the MN10300/AM33 architecture to the kernel [try #5]
    • From: David Howells <[email protected]>
  • Re: [PATCH 5/6] MN10300: Add the MN10300/AM33 architecture to the kernel [try #5]
    • From: David Howells <[email protected]>

• Prev by Date: Re: [PATCH] Include header required for INT_MAX
• Next by Date: Re: [patch 1/6] x86: apicdef unification: some constants made unsigned
• Previous by thread: Re: [PATCH 5/6] MN10300: Add the MN10300/AM33 architecture to the kernel [try #5]
• Next by thread: Re: [PATCH 5/6] MN10300: Add the MN10300/AM33 architecture to the kernel [try #5]
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]