298 lines
9.4 KiB
C
298 lines
9.4 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
/*
|
||
|
|
* include/asm-parisc/processor.h
|
||
|
|
*
|
||
|
|
* Copyright (C) 1994 Linus Torvalds
|
||
|
|
* Copyright (C) 2001 Grant Grundler
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __ASM_PARISC_PROCESSOR_H
|
||
|
|
#define __ASM_PARISC_PROCESSOR_H
|
||
|
|
|
||
|
|
#ifndef __ASSEMBLY__
|
||
|
|
#include <linux/threads.h>
|
||
|
|
|
||
|
|
#include <asm/assembly.h>
|
||
|
|
#include <asm/prefetch.h>
|
||
|
|
#include <asm/hardware.h>
|
||
|
|
#include <asm/pdc.h>
|
||
|
|
#include <asm/ptrace.h>
|
||
|
|
#include <asm/types.h>
|
||
|
|
#include <asm/percpu.h>
|
||
|
|
#endif /* __ASSEMBLY__ */
|
||
|
|
|
||
|
|
#define HAVE_ARCH_PICK_MMAP_LAYOUT
|
||
|
|
|
||
|
|
#define TASK_SIZE_OF(tsk) ((tsk)->thread.task_size)
|
||
|
|
#define TASK_SIZE TASK_SIZE_OF(current)
|
||
|
|
#define TASK_UNMAPPED_BASE (current->thread.map_base)
|
||
|
|
|
||
|
|
#define DEFAULT_TASK_SIZE32 (0xFFF00000UL)
|
||
|
|
#define DEFAULT_MAP_BASE32 (0x40000000UL)
|
||
|
|
|
||
|
|
#ifdef CONFIG_64BIT
|
||
|
|
#define DEFAULT_TASK_SIZE (MAX_ADDRESS-0xf000000)
|
||
|
|
#define DEFAULT_MAP_BASE (0x200000000UL)
|
||
|
|
#else
|
||
|
|
#define DEFAULT_TASK_SIZE DEFAULT_TASK_SIZE32
|
||
|
|
#define DEFAULT_MAP_BASE DEFAULT_MAP_BASE32
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* XXX: STACK_TOP actually should be STACK_BOTTOM for parisc.
|
||
|
|
* prumpf */
|
||
|
|
|
||
|
|
#define STACK_TOP TASK_SIZE
|
||
|
|
#define STACK_TOP_MAX DEFAULT_TASK_SIZE
|
||
|
|
|
||
|
|
#ifndef __ASSEMBLY__
|
||
|
|
|
||
|
|
unsigned long calc_max_stack_size(unsigned long stack_max);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Data detected about CPUs at boot time which is the same for all CPU's.
|
||
|
|
* HP boxes are SMP - ie identical processors.
|
||
|
|
*
|
||
|
|
* FIXME: some CPU rev info may be processor specific...
|
||
|
|
*/
|
||
|
|
struct system_cpuinfo_parisc {
|
||
|
|
unsigned int cpu_count;
|
||
|
|
unsigned int cpu_hz;
|
||
|
|
unsigned int hversion;
|
||
|
|
unsigned int sversion;
|
||
|
|
enum cpu_type cpu_type;
|
||
|
|
|
||
|
|
struct {
|
||
|
|
struct pdc_model model;
|
||
|
|
unsigned long versions;
|
||
|
|
unsigned long cpuid;
|
||
|
|
unsigned long capabilities;
|
||
|
|
char sys_model_name[81]; /* PDC-ROM returnes this model name */
|
||
|
|
} pdc;
|
||
|
|
|
||
|
|
const char *cpu_name; /* e.g. "PA7300LC (PCX-L2)" */
|
||
|
|
const char *family_name; /* e.g. "1.1e" */
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/* Per CPU data structure - ie varies per CPU. */
|
||
|
|
struct cpuinfo_parisc {
|
||
|
|
unsigned long it_value; /* Interval Timer at last timer Intr */
|
||
|
|
unsigned long irq_count; /* number of IRQ's since boot */
|
||
|
|
unsigned long cpuid; /* aka slot_number or set to NO_PROC_ID */
|
||
|
|
unsigned long hpa; /* Host Physical address */
|
||
|
|
unsigned long txn_addr; /* MMIO addr of EIR or id_eid */
|
||
|
|
#ifdef CONFIG_SMP
|
||
|
|
unsigned long pending_ipi; /* bitmap of type ipi_message_type */
|
||
|
|
#endif
|
||
|
|
unsigned long bh_count; /* number of times bh was invoked */
|
||
|
|
unsigned long fp_rev;
|
||
|
|
unsigned long fp_model;
|
||
|
|
unsigned long cpu_num; /* CPU number from PAT firmware */
|
||
|
|
unsigned long cpu_loc; /* CPU location from PAT firmware */
|
||
|
|
unsigned int state;
|
||
|
|
struct parisc_device *dev;
|
||
|
|
};
|
||
|
|
|
||
|
|
extern struct system_cpuinfo_parisc boot_cpu_data;
|
||
|
|
DECLARE_PER_CPU(struct cpuinfo_parisc, cpu_data);
|
||
|
|
extern int time_keeper_id; /* CPU used for timekeeping */
|
||
|
|
|
||
|
|
#define CPU_HVERSION ((boot_cpu_data.hversion >> 4) & 0x0FFF)
|
||
|
|
|
||
|
|
struct thread_struct {
|
||
|
|
struct pt_regs regs;
|
||
|
|
unsigned long task_size;
|
||
|
|
unsigned long map_base;
|
||
|
|
unsigned long flags;
|
||
|
|
};
|
||
|
|
|
||
|
|
#define task_pt_regs(tsk) ((struct pt_regs *)&((tsk)->thread.regs))
|
||
|
|
|
||
|
|
/* Thread struct flags. */
|
||
|
|
#define PARISC_UAC_NOPRINT (1UL << 0) /* see prctl and unaligned.c */
|
||
|
|
#define PARISC_UAC_SIGBUS (1UL << 1)
|
||
|
|
#define PARISC_KERNEL_DEATH (1UL << 31) /* see die_if_kernel()... */
|
||
|
|
|
||
|
|
#define PARISC_UAC_SHIFT 0
|
||
|
|
#define PARISC_UAC_MASK (PARISC_UAC_NOPRINT|PARISC_UAC_SIGBUS)
|
||
|
|
|
||
|
|
#define SET_UNALIGN_CTL(task,value) \
|
||
|
|
({ \
|
||
|
|
(task)->thread.flags = (((task)->thread.flags & ~PARISC_UAC_MASK) \
|
||
|
|
| (((value) << PARISC_UAC_SHIFT) & \
|
||
|
|
PARISC_UAC_MASK)); \
|
||
|
|
0; \
|
||
|
|
})
|
||
|
|
|
||
|
|
#define GET_UNALIGN_CTL(task,addr) \
|
||
|
|
({ \
|
||
|
|
put_user(((task)->thread.flags & PARISC_UAC_MASK) \
|
||
|
|
>> PARISC_UAC_SHIFT, (int __user *) (addr)); \
|
||
|
|
})
|
||
|
|
|
||
|
|
#define INIT_THREAD { \
|
||
|
|
.regs = { .gr = { 0, }, \
|
||
|
|
.fr = { 0, }, \
|
||
|
|
.sr = { 0, }, \
|
||
|
|
.iasq = { 0, }, \
|
||
|
|
.iaoq = { 0, }, \
|
||
|
|
.cr27 = 0, \
|
||
|
|
}, \
|
||
|
|
.task_size = DEFAULT_TASK_SIZE, \
|
||
|
|
.map_base = DEFAULT_MAP_BASE, \
|
||
|
|
.flags = 0 \
|
||
|
|
}
|
||
|
|
|
||
|
|
struct task_struct;
|
||
|
|
void show_trace(struct task_struct *task, unsigned long *stack);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Start user thread in another space.
|
||
|
|
*
|
||
|
|
* Note that we set both the iaoq and r31 to the new pc. When
|
||
|
|
* the kernel initially calls execve it will return through an
|
||
|
|
* rfi path that will use the values in the iaoq. The execve
|
||
|
|
* syscall path will return through the gateway page, and
|
||
|
|
* that uses r31 to branch to.
|
||
|
|
*
|
||
|
|
* For ELF we clear r23, because the dynamic linker uses it to pass
|
||
|
|
* the address of the finalizer function.
|
||
|
|
*
|
||
|
|
* We also initialize sr3 to an illegal value (illegal for our
|
||
|
|
* implementation, not for the architecture).
|
||
|
|
*/
|
||
|
|
typedef unsigned int elf_caddr_t;
|
||
|
|
|
||
|
|
/* The ELF abi wants things done a "wee bit" differently than
|
||
|
|
* som does. Supporting this behavior here avoids
|
||
|
|
* having our own version of create_elf_tables.
|
||
|
|
*
|
||
|
|
* Oh, and yes, that is not a typo, we are really passing argc in r25
|
||
|
|
* and argv in r24 (rather than r26 and r25). This is because that's
|
||
|
|
* where __libc_start_main wants them.
|
||
|
|
*
|
||
|
|
* Duplicated from dl-machine.h for the benefit of readers:
|
||
|
|
*
|
||
|
|
* Our initial stack layout is rather different from everyone else's
|
||
|
|
* due to the unique PA-RISC ABI. As far as I know it looks like
|
||
|
|
* this:
|
||
|
|
|
||
|
|
----------------------------------- (user startup code creates this frame)
|
||
|
|
| 32 bytes of magic |
|
||
|
|
|---------------------------------|
|
||
|
|
| 32 bytes argument/sp save area |
|
||
|
|
|---------------------------------| (bprm->p)
|
||
|
|
| ELF auxiliary info |
|
||
|
|
| (up to 28 words) |
|
||
|
|
|---------------------------------|
|
||
|
|
| NULL |
|
||
|
|
|---------------------------------|
|
||
|
|
| Environment pointers |
|
||
|
|
|---------------------------------|
|
||
|
|
| NULL |
|
||
|
|
|---------------------------------|
|
||
|
|
| Argument pointers |
|
||
|
|
|---------------------------------| <- argv
|
||
|
|
| argc (1 word) |
|
||
|
|
|---------------------------------| <- bprm->exec (HACK!)
|
||
|
|
| N bytes of slack |
|
||
|
|
|---------------------------------|
|
||
|
|
| filename passed to execve |
|
||
|
|
|---------------------------------| (mm->env_end)
|
||
|
|
| env strings |
|
||
|
|
|---------------------------------| (mm->env_start, mm->arg_end)
|
||
|
|
| arg strings |
|
||
|
|
|---------------------------------|
|
||
|
|
| additional faked arg strings if |
|
||
|
|
| we're invoked via binfmt_script |
|
||
|
|
|---------------------------------| (mm->arg_start)
|
||
|
|
stack base is at TASK_SIZE - rlim_max.
|
||
|
|
|
||
|
|
on downward growing arches, it looks like this:
|
||
|
|
stack base at TASK_SIZE
|
||
|
|
| filename passed to execve
|
||
|
|
| env strings
|
||
|
|
| arg strings
|
||
|
|
| faked arg strings
|
||
|
|
| slack
|
||
|
|
| ELF
|
||
|
|
| envps
|
||
|
|
| argvs
|
||
|
|
| argc
|
||
|
|
|
||
|
|
* The pleasant part of this is that if we need to skip arguments we
|
||
|
|
* can just decrement argc and move argv, because the stack pointer
|
||
|
|
* is utterly unrelated to the location of the environment and
|
||
|
|
* argument vectors.
|
||
|
|
*
|
||
|
|
* Note that the S/390 people took the easy way out and hacked their
|
||
|
|
* GCC to make the stack grow downwards.
|
||
|
|
*
|
||
|
|
* Final Note: For entry from syscall, the W (wide) bit of the PSW
|
||
|
|
* is stuffed into the lowest bit of the user sp (%r30), so we fill
|
||
|
|
* it in here from the current->personality
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define USER_WIDE_MODE (!is_32bit_task())
|
||
|
|
|
||
|
|
#define start_thread(regs, new_pc, new_sp) do { \
|
||
|
|
elf_addr_t *sp = (elf_addr_t *)new_sp; \
|
||
|
|
__u32 spaceid = (__u32)current->mm->context.space_id; \
|
||
|
|
elf_addr_t pc = (elf_addr_t)new_pc | 3; \
|
||
|
|
elf_caddr_t *argv = (elf_caddr_t *)bprm->exec + 1; \
|
||
|
|
\
|
||
|
|
regs->iasq[0] = spaceid; \
|
||
|
|
regs->iasq[1] = spaceid; \
|
||
|
|
regs->iaoq[0] = pc; \
|
||
|
|
regs->iaoq[1] = pc + 4; \
|
||
|
|
regs->sr[2] = LINUX_GATEWAY_SPACE; \
|
||
|
|
regs->sr[3] = 0xffff; \
|
||
|
|
regs->sr[4] = spaceid; \
|
||
|
|
regs->sr[5] = spaceid; \
|
||
|
|
regs->sr[6] = spaceid; \
|
||
|
|
regs->sr[7] = spaceid; \
|
||
|
|
regs->gr[ 0] = USER_PSW | (USER_WIDE_MODE ? PSW_W : 0); \
|
||
|
|
regs->fr[ 0] = 0LL; \
|
||
|
|
regs->fr[ 1] = 0LL; \
|
||
|
|
regs->fr[ 2] = 0LL; \
|
||
|
|
regs->fr[ 3] = 0LL; \
|
||
|
|
regs->gr[30] = (((unsigned long)sp + 63) &~ 63) | (USER_WIDE_MODE ? 1 : 0); \
|
||
|
|
regs->gr[31] = pc; \
|
||
|
|
\
|
||
|
|
get_user(regs->gr[25], (argv - 1)); \
|
||
|
|
regs->gr[24] = (long) argv; \
|
||
|
|
regs->gr[23] = 0; \
|
||
|
|
} while(0)
|
||
|
|
|
||
|
|
struct mm_struct;
|
||
|
|
|
||
|
|
extern unsigned long __get_wchan(struct task_struct *p);
|
||
|
|
|
||
|
|
#define KSTK_EIP(tsk) ((tsk)->thread.regs.iaoq[0])
|
||
|
|
#define KSTK_ESP(tsk) ((tsk)->thread.regs.gr[30])
|
||
|
|
|
||
|
|
#define cpu_relax() barrier()
|
||
|
|
|
||
|
|
/*
|
||
|
|
* parisc_requires_coherency() is used to identify the combined VIPT/PIPT
|
||
|
|
* cached CPUs which require a guarantee of coherency (no inequivalent aliases
|
||
|
|
* with different data, whether clean or not) to operate
|
||
|
|
*/
|
||
|
|
#ifdef CONFIG_PA8X00
|
||
|
|
extern int _parisc_requires_coherency;
|
||
|
|
#define parisc_requires_coherency() _parisc_requires_coherency
|
||
|
|
#else
|
||
|
|
#define parisc_requires_coherency() (0)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
extern int running_on_qemu;
|
||
|
|
|
||
|
|
extern void __noreturn toc_intr(struct pt_regs *regs);
|
||
|
|
extern void toc_handler(void);
|
||
|
|
extern unsigned int toc_handler_size;
|
||
|
|
extern unsigned int toc_handler_csum;
|
||
|
|
|
||
|
|
#endif /* __ASSEMBLY__ */
|
||
|
|
|
||
|
|
#endif /* __ASM_PARISC_PROCESSOR_H */
|