mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-28 15:13:55 +08:00
90035fe378
This adds the required functionality to fill in all pacas at runtime. With NR_CPUS=1024 text data bss dec hex filename 137 1704032 0 1704169 1a00e9 arch/powerpc/kernel/paca.o :Before 121 1179744 524288 1704153 1a00d9 arch/powerpc/kernel/paca.o :After Also remove unneeded #includes from arch/powerpc/kernel/paca.c Signed-off-by: Tony Breeds <tony@bakeyournoodle.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
88 lines
2.7 KiB
C
88 lines
2.7 KiB
C
/*
|
|
* 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/threads.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <asm/lppaca.h>
|
|
#include <asm/paca.h>
|
|
|
|
/* This symbol is provided by the linker - let it fill in the paca
|
|
* field correctly */
|
|
extern unsigned long __toc_start;
|
|
|
|
/*
|
|
* The structure which the hypervisor knows about - this structure
|
|
* should not cross a page boundary. The vpa_init/register_vpa call
|
|
* is now known to fail if the lppaca structure crosses a page
|
|
* boundary. The lppaca is also used on legacy iSeries and POWER5
|
|
* pSeries boxes. The lppaca is 640 bytes long, and cannot readily
|
|
* change since the hypervisor knows its layout, so a 1kB alignment
|
|
* will suffice to ensure that it doesn't cross a page boundary.
|
|
*/
|
|
struct lppaca lppaca[] = {
|
|
[0 ... (NR_CPUS-1)] = {
|
|
.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,
|
|
.vmxregs_in_use = 0,
|
|
},
|
|
};
|
|
|
|
/*
|
|
* 3 persistent SLBs are registered here. The buffer will be zero
|
|
* initially, hence will all be invaild until we actually write them.
|
|
*/
|
|
struct slb_shadow slb_shadow[] __cacheline_aligned = {
|
|
[0 ... (NR_CPUS-1)] = {
|
|
.persistent = SLB_NUM_BOLTED,
|
|
.buffer_length = sizeof(struct slb_shadow),
|
|
},
|
|
};
|
|
|
|
/* The Paca is an array with one entry per processor. Each contains an
|
|
* lppaca, which contains the information shared between the
|
|
* hypervisor and Linux.
|
|
* 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).
|
|
*/
|
|
struct paca_struct paca[NR_CPUS];
|
|
EXPORT_SYMBOL(paca);
|
|
|
|
void __init initialise_pacas(void)
|
|
{
|
|
int cpu;
|
|
|
|
/* The TOC register (GPR2) points 32kB into the TOC, so that 64kB
|
|
* of the TOC can be addressed using a single machine instruction.
|
|
*/
|
|
unsigned long kernel_toc = (unsigned long)(&__toc_start) + 0x8000UL;
|
|
|
|
/* Can't use for_each_*_cpu, as they aren't functional yet */
|
|
for (cpu = 0; cpu < NR_CPUS; cpu++) {
|
|
struct paca_struct *new_paca = &paca[cpu];
|
|
|
|
new_paca->lppaca_ptr = &lppaca[cpu];
|
|
new_paca->lock_token = 0x8000;
|
|
new_paca->paca_index = cpu;
|
|
new_paca->kernel_toc = kernel_toc;
|
|
new_paca->hw_cpu_id = 0xffff;
|
|
new_paca->slb_shadow_ptr = &slb_shadow[cpu];
|
|
new_paca->__current = &init_task;
|
|
|
|
}
|
|
}
|