2 * This is the MIPS Linux incarnation of arch-dependent OS-dependent
3 * routines. See also "linux-os.c".
7 * This software is part of the SBCL system. See the README file for
10 * This software is derived from the CMU CL system, which was
11 * written at Carnegie Mellon University and released into the
12 * public domain. The software is in the public domain and is
13 * provided with absolutely no warranty. See the COPYING and CREDITS
14 * files for more information.
18 #include <sys/param.h>
24 #include "interrupt.h"
28 #include <sys/socket.h>
29 #include <sys/utsname.h>
31 #include <sys/types.h>
38 /* for cacheflush() */
39 #include <asm/cachectl.h>
41 /* FIXME: For CAUSEF_BD */
42 #include <asm/mipsregs.h>
43 size_t os_vm_page_size;
45 #ifdef LISP_FEATURE_SB_THREAD
46 #error "Define threading support functions"
48 struct thread *arch_os_get_current_thread() {
51 int arch_os_thread_init(struct thread *thread) {
52 return 1; /* success */
54 int arch_os_thread_cleanup(struct thread *thread) {
55 return 1; /* success */
59 os_context_register_t *
60 os_context_register_addr(os_context_t *context, int offset)
63 /* KLUDGE: I'm not sure, but it's possible that Linux puts the
64 contents of the Processor Status Word in the (wired-zero)
65 slot in the mcontext. In any case, the following is
66 unlikely to do any harm: */
67 static unsigned long long zero;
71 return &(((struct sigcontext *) &(context->uc_mcontext))->sc_regs[offset]);
75 os_context_register_t *
76 os_context_pc_addr(os_context_t *context)
78 /* Why do I get all the silly ports? -- CSR, 2002-08-11 */
79 return &(((struct sigcontext *) &(context->uc_mcontext))->sc_pc);
83 os_context_sigmask_addr(os_context_t *context)
85 return &(context->uc_sigmask);
89 os_restore_fp_control(os_context_t *context)
91 /* FIXME: Probably do something. */
95 os_context_bd_cause(os_context_t *context)
97 /* We need to see if whatever happened, happened because of a
99 /* FIXME: However, I'm not convinced that the values that Linux
100 puts in this slot are actually right; specifically, attempting
101 to compile sbcl with sbcl-0.7.7.7 lead to an "infinite SIGTRAP
102 loop" where a (BREAK 16) not in a branch delay slot would have
103 CAUSEF_BD filled. So, we comment
105 return (((struct sigcontext *) &(context->uc_mcontext))->sc_cause
108 out and return 0 always. -- CSR, 2002-09-02 */
113 os_flush_icache(os_vm_address_t address, os_vm_size_t length)
115 if (cacheflush(address, length, ICACHE) == -1)
116 perror("cacheflush");