// SPDX-License-Identifier: GPL-2.0-only
/*
* Common prep / pmac / chrp boot and setup code .
*/
#include <linux/module.h>
#include <linux/string.h>
#include <linux/sched.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/reboot.h>
#include <linux/delay.h>
#include <linux/initrd.h>
#include <linux/tty.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/cpu.h>
#include <linux/console.h>
#include <linux/memblock.h>
#include <linux/export.h>
#include <linux/nvram.h>
#include <linux/pgtable.h>
#include <linux/of_fdt.h>
#include <linux/irq.h>
#include <asm /io.h>
#include <asm /processor.h>
#include <asm /setup.h>
#include <asm /smp.h>
#include <asm /elf.h>
#include <asm /cputable.h>
#include <asm /bootx.h>
#include <asm /btext.h>
#include <asm /machdep.h>
#include <linux/uaccess.h>
#include <asm /pmac_feature.h>
#include <asm /sections.h>
#include <asm /nvram.h>
#include <asm /xmon.h>
#include <asm /time.h>
#include <asm /serial.h>
#include <asm /udbg.h>
#include <asm /text-patching.h>
#include <asm /cpu_has_feature.h>
#include <asm /asm -prototypes.h>
#include <asm /kdump.h>
#include <asm /feature-fixups.h>
#include <asm /early_ioremap.h>
#include "setup.h"
#define DBG(fmt...)
extern void bootx_init(unsigned long r4, unsigned long phys);
int boot_cpuid_phys;
EXPORT_SYMBOL_GPL(boot_cpuid_phys);
int smp_hw_index[NR_CPUS];
EXPORT_SYMBOL(smp_hw_index);
unsigned int DMA_MODE_READ;
unsigned int DMA_MODE_WRITE;
EXPORT_SYMBOL(DMA_MODE_READ);
EXPORT_SYMBOL(DMA_MODE_WRITE);
/*
* This is run before start_kernel ( ) , the kernel has been relocated
* and we are running with enough of the MMU enabled to have our
* proper kernel virtual addresses
*
* We do the initial parsing of the flat device - tree and prepares
* for the MMU to be fully initialized .
*/
notrace void __init machine_init(u64 dt_ptr)
{
u32 *addr = (u32 *)patch_site_addr(&patch__memset_nocache);
ppc_inst_t insn;
/* Configure static keys first, now that we're relocated. */
setup_feature_keys();
early_ioremap_init();
/* Enable early debugging if any specified (see udbg.h) */
udbg_early_init();
patch_instruction_site(&patch__memcpy_nocache, ppc_inst(PPC_RAW_NOP()));
create_cond_branch(&insn, addr, branch_target(addr), 0 x820000);
patch_instruction(addr, insn); /* replace b by bne cr0 */
/* Do some early initialization based on the flat device tree */
early_init_devtree(__va(dt_ptr));
early_init_mmu();
setup_kdump_trampoline();
}
/* Checks "l2cr=xxxx" command-line option */
static int __init ppc_setup_l2cr(char *str)
{
if (cpu_has_feature(CPU_FTR_L2CR)) {
unsigned long val = simple_strtoul(str, NULL, 0 );
printk(KERN_INFO "l2cr set to %lx\n" , val);
_set_L2CR(0 ); /* force invalidate by disable cache */
_set_L2CR(val); /* and enable it */
}
return 1 ;
}
__setup("l2cr=" , ppc_setup_l2cr);
/* Checks "l3cr=xxxx" command-line option */
static int __init ppc_setup_l3cr(char *str)
{
if (cpu_has_feature(CPU_FTR_L3CR)) {
unsigned long val = simple_strtoul(str, NULL, 0 );
printk(KERN_INFO "l3cr set to %lx\n" , val);
_set_L3CR(val); /* and enable it */
}
return 1 ;
}
__setup("l3cr=" , ppc_setup_l3cr);
static int __init ppc_init(void )
{
/* clear the progress line */
if (ppc_md.progress)
ppc_md.progress(" " , 0 xffff);
/* call platform init */
if (ppc_md.init != NULL) {
ppc_md.init();
}
return 0 ;
}
arch_initcall(ppc_init);
static void *__init alloc_stack(void )
{
return memblock_alloc_or_panic(THREAD_SIZE, THREAD_ALIGN);
}
void __init irqstack_early_init(void )
{
unsigned int i;
if (IS_ENABLED(CONFIG_VMAP_STACK))
return ;
/* interrupt stacks must be in lowmem, we get that for free on ppc32
* as the memblock is limited to lowmem by default */
for_each_possible_cpu(i) {
softirq_ctx[i] = alloc_stack();
hardirq_ctx[i] = alloc_stack();
}
}
#ifdef CONFIG_VMAP_STACK
void *emergency_ctx[NR_CPUS] __ro_after_init = {[0 ] = &init_stack};
void __init emergency_stack_init(void )
{
unsigned int i;
for_each_possible_cpu(i)
emergency_ctx[i] = alloc_stack();
}
#endif
#ifdef CONFIG_BOOKE
void __init exc_lvl_early_init(void )
{
unsigned int i, hw_cpu;
/* interrupt stacks must be in lowmem, we get that for free on ppc32
* as the memblock is limited to lowmem by MEMBLOCK_REAL_LIMIT */
for_each_possible_cpu(i) {
#ifdef CONFIG_SMP
hw_cpu = get_hard_smp_processor_id(i);
#else
hw_cpu = 0 ;
#endif
critirq_ctx[hw_cpu] = alloc_stack();
#ifdef CONFIG_BOOKE
dbgirq_ctx[hw_cpu] = alloc_stack();
mcheckirq_ctx[hw_cpu] = alloc_stack();
#endif
}
}
#endif
void __init setup_power_save(void )
{
#ifdef CONFIG_PPC_BOOK3S_32
if (cpu_has_feature(CPU_FTR_CAN_DOZE) ||
cpu_has_feature(CPU_FTR_CAN_NAP))
ppc_md.power_save = ppc6xx_idle;
#endif
#ifdef CONFIG_PPC_E500
if (cpu_has_feature(CPU_FTR_CAN_DOZE) ||
cpu_has_feature(CPU_FTR_CAN_NAP))
ppc_md.power_save = e500_idle;
#endif
}
__init void initialize_cache_info(void )
{
/*
* Set cache line size based on type of cpu as a default .
* Systems with OF can look in the properties on the cpu node ( s )
* for a possibly more accurate value .
*/
dcache_bsize = cur_cpu_spec->dcache_bsize;
icache_bsize = cur_cpu_spec->icache_bsize;
}
Messung V0.5 in Prozent C=95 H=68 G=82
¤ Dauer der Verarbeitung: 0.10 Sekunden
(vorverarbeitet am 2026-09-27)
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