a7f290dad3
This patch moves the vdso's to arch/powerpc, adds support for the 32 bits vdso to the 32 bits kernel, rename systemcfg (finally !), and adds some new (still untested) routines to both vdso's: clock_gettime() with support for CLOCK_REALTIME and CLOCK_MONOTONIC, clock_getres() (same clocks) and get_tbfreq() for glibc to retreive the timebase frequency. Tom,Steve: The implementation of get_tbfreq() I've done for 32 bits returns a long long (r3, r4) not a long. This is such that if we ever add support for >4Ghz timebases on ppc32, the userland interface won't have to change. I have tested gettimeofday() using some glibc patches in both ppc32 and ppc64 kernels using 32 bits userland (I haven't had a chance to test a 64 bits userland yet, but the implementation didn't change and was tested earlier). I haven't tested yet the new functions. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
136 lines
5.0 KiB
C
136 lines
5.0 KiB
C
/*
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* c 2001 PPC 64 Team, IBM Corp
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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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#include <linux/config.h>
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#include <linux/types.h>
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#include <linux/threads.h>
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#include <linux/module.h>
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#include <asm/processor.h>
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#include <asm/ptrace.h>
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#include <asm/page.h>
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#include <asm/lppaca.h>
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#include <asm/iseries/it_lp_queue.h>
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#include <asm/paca.h>
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/* This symbol is provided by the linker - let it fill in the paca
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* field correctly */
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extern unsigned long __toc_start;
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/* The Paca is an array with one entry per processor. Each contains an
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* lppaca, which contains the information shared between the
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* hypervisor and Linux. Each also contains an ItLpRegSave area which
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* is used by the hypervisor to save registers.
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* On systems with hardware multi-threading, there are two threads
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* per processor. The Paca array must contain an entry for each thread.
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* The VPD Areas will give a max logical processors = 2 * max physical
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* processors. The processor VPD array needs one entry per physical
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* processor (not thread).
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*/
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#define PACA_INIT_COMMON(number, start, asrr, asrv) \
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.lock_token = 0x8000, \
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.paca_index = (number), /* Paca Index */ \
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.default_decr = 0x00ff0000, /* Initial Decr */ \
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.kernel_toc = (unsigned long)(&__toc_start) + 0x8000UL, \
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.stab_real = (asrr), /* Real pointer to segment table */ \
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.stab_addr = (asrv), /* Virt pointer to segment table */ \
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.cpu_start = (start), /* Processor start */ \
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.hw_cpu_id = 0xffff, \
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.lppaca = { \
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.desc = 0xd397d781, /* "LpPa" */ \
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.size = sizeof(struct lppaca), \
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.dyn_proc_status = 2, \
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.decr_val = 0x00ff0000, \
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.fpregs_in_use = 1, \
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.end_of_quantum = 0xfffffffffffffffful, \
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.slb_count = 64, \
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.vmxregs_in_use = 0, \
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}, \
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#ifdef CONFIG_PPC_ISERIES
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#define PACA_INIT_ISERIES(number) \
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.lppaca_ptr = &paca[number].lppaca, \
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.reg_save_ptr = &paca[number].reg_save, \
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.reg_save = { \
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.xDesc = 0xd397d9e2, /* "LpRS" */ \
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.xSize = sizeof(struct ItLpRegSave) \
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}
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#define PACA_INIT(number) \
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{ \
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PACA_INIT_COMMON(number, 0, 0, 0) \
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PACA_INIT_ISERIES(number) \
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}
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#define BOOTCPU_PACA_INIT(number) \
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{ \
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PACA_INIT_COMMON(number, 1, 0, (u64)&initial_stab) \
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PACA_INIT_ISERIES(number) \
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}
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#else
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#define PACA_INIT(number) \
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{ \
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PACA_INIT_COMMON(number, 0, 0, 0) \
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}
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#define BOOTCPU_PACA_INIT(number) \
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{ \
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PACA_INIT_COMMON(number, 1, STAB0_PHYS_ADDR, (u64)&initial_stab) \
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}
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#endif
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struct paca_struct paca[] = {
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BOOTCPU_PACA_INIT(0),
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#if NR_CPUS > 1
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PACA_INIT( 1), PACA_INIT( 2), PACA_INIT( 3),
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#if NR_CPUS > 4
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PACA_INIT( 4), PACA_INIT( 5), PACA_INIT( 6), PACA_INIT( 7),
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#if NR_CPUS > 8
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PACA_INIT( 8), PACA_INIT( 9), PACA_INIT( 10), PACA_INIT( 11),
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PACA_INIT( 12), PACA_INIT( 13), PACA_INIT( 14), PACA_INIT( 15),
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PACA_INIT( 16), PACA_INIT( 17), PACA_INIT( 18), PACA_INIT( 19),
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PACA_INIT( 20), PACA_INIT( 21), PACA_INIT( 22), PACA_INIT( 23),
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PACA_INIT( 24), PACA_INIT( 25), PACA_INIT( 26), PACA_INIT( 27),
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PACA_INIT( 28), PACA_INIT( 29), PACA_INIT( 30), PACA_INIT( 31),
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#if NR_CPUS > 32
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PACA_INIT( 32), PACA_INIT( 33), PACA_INIT( 34), PACA_INIT( 35),
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PACA_INIT( 36), PACA_INIT( 37), PACA_INIT( 38), PACA_INIT( 39),
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PACA_INIT( 40), PACA_INIT( 41), PACA_INIT( 42), PACA_INIT( 43),
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PACA_INIT( 44), PACA_INIT( 45), PACA_INIT( 46), PACA_INIT( 47),
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PACA_INIT( 48), PACA_INIT( 49), PACA_INIT( 50), PACA_INIT( 51),
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PACA_INIT( 52), PACA_INIT( 53), PACA_INIT( 54), PACA_INIT( 55),
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PACA_INIT( 56), PACA_INIT( 57), PACA_INIT( 58), PACA_INIT( 59),
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PACA_INIT( 60), PACA_INIT( 61), PACA_INIT( 62), PACA_INIT( 63),
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#if NR_CPUS > 64
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PACA_INIT( 64), PACA_INIT( 65), PACA_INIT( 66), PACA_INIT( 67),
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PACA_INIT( 68), PACA_INIT( 69), PACA_INIT( 70), PACA_INIT( 71),
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PACA_INIT( 72), PACA_INIT( 73), PACA_INIT( 74), PACA_INIT( 75),
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PACA_INIT( 76), PACA_INIT( 77), PACA_INIT( 78), PACA_INIT( 79),
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PACA_INIT( 80), PACA_INIT( 81), PACA_INIT( 82), PACA_INIT( 83),
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PACA_INIT( 84), PACA_INIT( 85), PACA_INIT( 86), PACA_INIT( 87),
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PACA_INIT( 88), PACA_INIT( 89), PACA_INIT( 90), PACA_INIT( 91),
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PACA_INIT( 92), PACA_INIT( 93), PACA_INIT( 94), PACA_INIT( 95),
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PACA_INIT( 96), PACA_INIT( 97), PACA_INIT( 98), PACA_INIT( 99),
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PACA_INIT(100), PACA_INIT(101), PACA_INIT(102), PACA_INIT(103),
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PACA_INIT(104), PACA_INIT(105), PACA_INIT(106), PACA_INIT(107),
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PACA_INIT(108), PACA_INIT(109), PACA_INIT(110), PACA_INIT(111),
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PACA_INIT(112), PACA_INIT(113), PACA_INIT(114), PACA_INIT(115),
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PACA_INIT(116), PACA_INIT(117), PACA_INIT(118), PACA_INIT(119),
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PACA_INIT(120), PACA_INIT(121), PACA_INIT(122), PACA_INIT(123),
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PACA_INIT(124), PACA_INIT(125), PACA_INIT(126), PACA_INIT(127),
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#endif
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#endif
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#endif
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#endif
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#endif
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};
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EXPORT_SYMBOL(paca);
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