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kernel-fxtec-pro1x/arch/ppc64/kernel/pacaData.c
Michael Ellerman bea248fb30 [PATCH] ppc64: Remove lpqueue pointer from the paca on iSeries 
The iSeries code keeps a pointer to the ItLpQueue in its paca struct. But
all these pointers end up pointing to the one place, ie. xItLpQueue.

So remove the pointer from the paca struct and just refer to xItLpQueue
directly where needed.

The only complication is that the spread_lpevents logic was implemented by
having a NULL lpqueue pointer in the paca on CPUs that weren't supposed to
process events. Instead we just compare the spread_lpevents value to the
processor id to get the same behaviour.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-06-30 15:07:09 +10:00

223 lines
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/*
* c 2001 PPC 64 Team, IBM Corp
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/config.h>
#include <linux/types.h>
#include <linux/threads.h>
#include <linux/module.h>
#include <asm/processor.h>
#include <asm/ptrace.h>
#include <asm/page.h>
#include <asm/lppaca.h>
#include <asm/iSeries/ItLpQueue.h>
#include <asm/paca.h>
static union {
struct systemcfg data;
u8 page[PAGE_SIZE];
} systemcfg_store __page_aligned;
struct systemcfg *systemcfg = &systemcfg_store.data;
EXPORT_SYMBOL(systemcfg);
/* This symbol is provided by the linker - let it fill in the paca
* field correctly */
extern unsigned long __toc_start;
/* The Paca is an array with one entry per processor. Each contains an
* lppaca, which contains the information shared between the
* hypervisor and Linux. Each also contains an ItLpRegSave area which
* is used by the hypervisor to save registers.
* On systems with hardware multi-threading, there are two threads
* per processor. The Paca array must contain an entry for each thread.
* The VPD Areas will give a max logical processors = 2 * max physical
* processors. The processor VPD array needs one entry per physical
* processor (not thread).
*/
#ifdef CONFIG_PPC_ISERIES
#define EXTRA_INITS(number, lpq) \
.lppaca_ptr = &paca[number].lppaca, \
.reg_save_ptr = &paca[number].reg_save, \
.reg_save = { \
.xDesc = 0xd397d9e2, /* "LpRS" */ \
.xSize = sizeof(struct ItLpRegSave) \
},
#else
#define EXTRA_INITS(number, lpq)
#endif
#define PACAINITDATA(number,start,lpq,asrr,asrv) \
{ \
.lock_token = 0x8000, \
.paca_index = (number), /* Paca Index */ \
.default_decr = 0x00ff0000, /* Initial Decr */ \
.kernel_toc = (unsigned long)(&__toc_start) + 0x8000UL, \
.stab_real = (asrr), /* Real pointer to segment table */ \
.stab_addr = (asrv), /* Virt pointer to segment table */ \
.cpu_start = (start), /* Processor start */ \
.hw_cpu_id = 0xffff, \
.lppaca = { \
.desc = 0xd397d781, /* "LpPa" */ \
.size = sizeof(struct lppaca), \
.dyn_proc_status = 2, \
.decr_val = 0x00ff0000, \
.fpregs_in_use = 1, \
.end_of_quantum = 0xfffffffffffffffful, \
.slb_count = 64, \
}, \
EXTRA_INITS((number), (lpq)) \
}
struct paca_struct paca[] = {
#ifdef CONFIG_PPC_ISERIES
PACAINITDATA( 0, 1, &xItLpQueue, 0, STAB0_VIRT_ADDR),
#else
PACAINITDATA( 0, 1, NULL, STAB0_PHYS_ADDR, STAB0_VIRT_ADDR),
#endif
#if NR_CPUS > 1
PACAINITDATA( 1, 0, NULL, 0, 0),
PACAINITDATA( 2, 0, NULL, 0, 0),
PACAINITDATA( 3, 0, NULL, 0, 0),
#if NR_CPUS > 4
PACAINITDATA( 4, 0, NULL, 0, 0),
PACAINITDATA( 5, 0, NULL, 0, 0),
PACAINITDATA( 6, 0, NULL, 0, 0),
PACAINITDATA( 7, 0, NULL, 0, 0),
#if NR_CPUS > 8
PACAINITDATA( 8, 0, NULL, 0, 0),
PACAINITDATA( 9, 0, NULL, 0, 0),
PACAINITDATA(10, 0, NULL, 0, 0),
PACAINITDATA(11, 0, NULL, 0, 0),
PACAINITDATA(12, 0, NULL, 0, 0),
PACAINITDATA(13, 0, NULL, 0, 0),
PACAINITDATA(14, 0, NULL, 0, 0),
PACAINITDATA(15, 0, NULL, 0, 0),
PACAINITDATA(16, 0, NULL, 0, 0),
PACAINITDATA(17, 0, NULL, 0, 0),
PACAINITDATA(18, 0, NULL, 0, 0),
PACAINITDATA(19, 0, NULL, 0, 0),
PACAINITDATA(20, 0, NULL, 0, 0),
PACAINITDATA(21, 0, NULL, 0, 0),
PACAINITDATA(22, 0, NULL, 0, 0),
PACAINITDATA(23, 0, NULL, 0, 0),
PACAINITDATA(24, 0, NULL, 0, 0),
PACAINITDATA(25, 0, NULL, 0, 0),
PACAINITDATA(26, 0, NULL, 0, 0),
PACAINITDATA(27, 0, NULL, 0, 0),
PACAINITDATA(28, 0, NULL, 0, 0),
PACAINITDATA(29, 0, NULL, 0, 0),
PACAINITDATA(30, 0, NULL, 0, 0),
PACAINITDATA(31, 0, NULL, 0, 0),
#if NR_CPUS > 32
PACAINITDATA(32, 0, NULL, 0, 0),
PACAINITDATA(33, 0, NULL, 0, 0),
PACAINITDATA(34, 0, NULL, 0, 0),
PACAINITDATA(35, 0, NULL, 0, 0),
PACAINITDATA(36, 0, NULL, 0, 0),
PACAINITDATA(37, 0, NULL, 0, 0),
PACAINITDATA(38, 0, NULL, 0, 0),
PACAINITDATA(39, 0, NULL, 0, 0),
PACAINITDATA(40, 0, NULL, 0, 0),
PACAINITDATA(41, 0, NULL, 0, 0),
PACAINITDATA(42, 0, NULL, 0, 0),
PACAINITDATA(43, 0, NULL, 0, 0),
PACAINITDATA(44, 0, NULL, 0, 0),
PACAINITDATA(45, 0, NULL, 0, 0),
PACAINITDATA(46, 0, NULL, 0, 0),
PACAINITDATA(47, 0, NULL, 0, 0),
PACAINITDATA(48, 0, NULL, 0, 0),
PACAINITDATA(49, 0, NULL, 0, 0),
PACAINITDATA(50, 0, NULL, 0, 0),
PACAINITDATA(51, 0, NULL, 0, 0),
PACAINITDATA(52, 0, NULL, 0, 0),
PACAINITDATA(53, 0, NULL, 0, 0),
PACAINITDATA(54, 0, NULL, 0, 0),
PACAINITDATA(55, 0, NULL, 0, 0),
PACAINITDATA(56, 0, NULL, 0, 0),
PACAINITDATA(57, 0, NULL, 0, 0),
PACAINITDATA(58, 0, NULL, 0, 0),
PACAINITDATA(59, 0, NULL, 0, 0),
PACAINITDATA(60, 0, NULL, 0, 0),
PACAINITDATA(61, 0, NULL, 0, 0),
PACAINITDATA(62, 0, NULL, 0, 0),
PACAINITDATA(63, 0, NULL, 0, 0),
#if NR_CPUS > 64
PACAINITDATA(64, 0, NULL, 0, 0),
PACAINITDATA(65, 0, NULL, 0, 0),
PACAINITDATA(66, 0, NULL, 0, 0),
PACAINITDATA(67, 0, NULL, 0, 0),
PACAINITDATA(68, 0, NULL, 0, 0),
PACAINITDATA(69, 0, NULL, 0, 0),
PACAINITDATA(70, 0, NULL, 0, 0),
PACAINITDATA(71, 0, NULL, 0, 0),
PACAINITDATA(72, 0, NULL, 0, 0),
PACAINITDATA(73, 0, NULL, 0, 0),
PACAINITDATA(74, 0, NULL, 0, 0),
PACAINITDATA(75, 0, NULL, 0, 0),
PACAINITDATA(76, 0, NULL, 0, 0),
PACAINITDATA(77, 0, NULL, 0, 0),
PACAINITDATA(78, 0, NULL, 0, 0),
PACAINITDATA(79, 0, NULL, 0, 0),
PACAINITDATA(80, 0, NULL, 0, 0),
PACAINITDATA(81, 0, NULL, 0, 0),
PACAINITDATA(82, 0, NULL, 0, 0),
PACAINITDATA(83, 0, NULL, 0, 0),
PACAINITDATA(84, 0, NULL, 0, 0),
PACAINITDATA(85, 0, NULL, 0, 0),
PACAINITDATA(86, 0, NULL, 0, 0),
PACAINITDATA(87, 0, NULL, 0, 0),
PACAINITDATA(88, 0, NULL, 0, 0),
PACAINITDATA(89, 0, NULL, 0, 0),
PACAINITDATA(90, 0, NULL, 0, 0),
PACAINITDATA(91, 0, NULL, 0, 0),
PACAINITDATA(92, 0, NULL, 0, 0),
PACAINITDATA(93, 0, NULL, 0, 0),
PACAINITDATA(94, 0, NULL, 0, 0),
PACAINITDATA(95, 0, NULL, 0, 0),
PACAINITDATA(96, 0, NULL, 0, 0),
PACAINITDATA(97, 0, NULL, 0, 0),
PACAINITDATA(98, 0, NULL, 0, 0),
PACAINITDATA(99, 0, NULL, 0, 0),
PACAINITDATA(100, 0, NULL, 0, 0),
PACAINITDATA(101, 0, NULL, 0, 0),
PACAINITDATA(102, 0, NULL, 0, 0),
PACAINITDATA(103, 0, NULL, 0, 0),
PACAINITDATA(104, 0, NULL, 0, 0),
PACAINITDATA(105, 0, NULL, 0, 0),
PACAINITDATA(106, 0, NULL, 0, 0),
PACAINITDATA(107, 0, NULL, 0, 0),
PACAINITDATA(108, 0, NULL, 0, 0),
PACAINITDATA(109, 0, NULL, 0, 0),
PACAINITDATA(110, 0, NULL, 0, 0),
PACAINITDATA(111, 0, NULL, 0, 0),
PACAINITDATA(112, 0, NULL, 0, 0),
PACAINITDATA(113, 0, NULL, 0, 0),
PACAINITDATA(114, 0, NULL, 0, 0),
PACAINITDATA(115, 0, NULL, 0, 0),
PACAINITDATA(116, 0, NULL, 0, 0),
PACAINITDATA(117, 0, NULL, 0, 0),
PACAINITDATA(118, 0, NULL, 0, 0),
PACAINITDATA(119, 0, NULL, 0, 0),
PACAINITDATA(120, 0, NULL, 0, 0),
PACAINITDATA(121, 0, NULL, 0, 0),
PACAINITDATA(122, 0, NULL, 0, 0),
PACAINITDATA(123, 0, NULL, 0, 0),
PACAINITDATA(124, 0, NULL, 0, 0),
PACAINITDATA(125, 0, NULL, 0, 0),
PACAINITDATA(126, 0, NULL, 0, 0),
PACAINITDATA(127, 0, NULL, 0, 0),
#endif
#endif
#endif
#endif
#endif
};
EXPORT_SYMBOL(paca);
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