2007-02-08 02:33:51 -05:00
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/*
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* Copyright 2006 IBM Corporation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _PSERIES_PSERIES_H
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#define _PSERIES_PSERIES_H
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2007-07-18 17:56:32 -04:00
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extern void __init fw_feature_init(const char *hypertas, unsigned long len);
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2007-02-08 02:33:51 -05:00
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struct pt_regs;
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extern int pSeries_system_reset_exception(struct pt_regs *regs);
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extern int pSeries_machine_check_exception(struct pt_regs *regs);
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2007-02-08 02:33:55 -05:00
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#ifdef CONFIG_SMP
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extern void smp_init_pseries_mpic(void);
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extern void smp_init_pseries_xics(void);
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#else
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2007-05-15 23:21:09 -04:00
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static inline void smp_init_pseries_mpic(void) { };
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static inline void smp_init_pseries_xics(void) { };
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2007-02-08 02:33:55 -05:00
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#endif
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2007-02-08 02:33:55 -05:00
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#ifdef CONFIG_KEXEC
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extern void setup_kexec_cpu_down_xics(void);
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extern void setup_kexec_cpu_down_mpic(void);
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#else
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2007-02-14 00:08:05 -05:00
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static inline void setup_kexec_cpu_down_xics(void) { }
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static inline void setup_kexec_cpu_down_mpic(void) { }
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2007-02-08 02:33:55 -05:00
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#endif
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[POWERPC] Rewrite IO allocation & mapping on powerpc64
This rewrites pretty much from scratch the handling of MMIO and PIO
space allocations on powerpc64. The main goals are:
- Get rid of imalloc and use more common code where possible
- Simplify the current mess so that PIO space is allocated and
mapped in a single place for PCI bridges
- Handle allocation constraints of PIO for all bridges including
hot plugged ones within the 2GB space reserved for IO ports,
so that devices on hotplugged busses will now work with drivers
that assume IO ports fit in an int.
- Cleanup and separate tracking of the ISA space in the reserved
low 64K of IO space. No ISA -> Nothing mapped there.
I booted a cell blade with IDE on PIO and MMIO and a dual G5 so
far, that's it :-)
With this patch, all allocations are done using the code in
mm/vmalloc.c, though we use the low level __get_vm_area with
explicit start/stop constraints in order to manage separate
areas for vmalloc/vmap, ioremap, and PCI IOs.
This greatly simplifies a lot of things, as you can see in the
diffstat of that patch :-)
A new pair of functions pcibios_map/unmap_io_space() now replace
all of the previous code that used to manipulate PCI IOs space.
The allocation is done at mapping time, which is now called from
scan_phb's, just before the devices are probed (instead of after,
which is by itself a bug fix). The only other caller is the PCI
hotplug code for hot adding PCI-PCI bridges (slots).
imalloc is gone, as is the "sub-allocation" thing, but I do beleive
that hotplug should still work in the sense that the space allocation
is always done by the PHB, but if you unmap a child bus of this PHB
(which seems to be possible), then the code should properly tear
down all the HPTE mappings for that area of the PHB allocated IO space.
I now always reserve the first 64K of IO space for the bridge with
the ISA bus on it. I have moved the code for tracking ISA in a separate
file which should also make it smarter if we ever are capable of
hot unplugging or re-plugging an ISA bridge.
This should have a side effect on platforms like powermac where VGA IOs
will no longer work. This is done on purpose though as they would have
worked semi-randomly before. The idea at this point is to isolate drivers
that might need to access those and fix them by providing a proper
function to obtain an offset to the legacy IOs of a given bus.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-06-04 01:15:36 -04:00
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extern void pSeries_final_fixup(void);
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2007-02-08 17:01:17 -05:00
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/* Poweron flag used for enabling auto ups restart */
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extern unsigned long rtas_poweron_auto;
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2008-04-15 23:51:48 -04:00
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extern void find_udbg_vterm(void);
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2007-02-08 02:33:51 -05:00
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#endif /* _PSERIES_PSERIES_H */
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