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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 | /* 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 <linux/irqreturn.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__ struct rlimit; unsigned long mmap_upper_limit(struct rlimit *rlim_stack); 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; extern void do_cpu_irq_mask(struct pt_regs *); extern irqreturn_t timer_interrupt(int, void *); extern irqreturn_t ipi_interrupt(int, void *); extern void start_cpu_itimer(void); extern void handle_interruption(int, struct pt_regs *); /* called from assembly code: */ extern void start_parisc(void); extern void smp_callin(unsigned long); extern void sys_rt_sigreturn(struct pt_regs *, int); extern void do_notify_resume(struct pt_regs *, long); extern long do_syscall_trace_enter(struct pt_regs *); extern void do_syscall_trace_exit(struct pt_regs *); /* CPU startup and info */ struct seq_file; extern void early_trap_init(void); extern void collect_boot_cpu_data(void); extern void btlb_init_per_cpu(void); extern int show_cpuinfo (struct seq_file *m, void *v); /* driver code in driver/parisc */ extern void processor_init(void); struct parisc_device; struct resource; extern void sba_distributed_lmmio(struct parisc_device *, struct resource *); extern void sba_directed_lmmio(struct parisc_device *, struct resource *); extern void lba_set_iregs(struct parisc_device *lba, u32 ibase, u32 imask); extern void ccio_cujo20_fixup(struct parisc_device *dev, u32 iovp); #endif /* __ASSEMBLY__ */ #endif /* __ASM_PARISC_PROCESSOR_H */ |