| /* 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; |
| |
| /* Free all resources held by a thread. */ |
| extern void release_thread(struct task_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 */ |