arch/powerpc/platforms/pseries/plpar_wrappers.h

   1 #ifndef _PSERIES_PLPAR_WRAPPERS_H
   2 #define _PSERIES_PLPAR_WRAPPERS_H
   3
   4 #include <linux/string.h>
   5
   6 #include <asm/hvcall.h>
   7 #include <asm/paca.h>
   8 #include <asm/page.h>
   9
  10 /* Get state of physical CPU from query_cpu_stopped */
  11 int smp_query_cpu_stopped(unsigned int pcpu);
  12 #define QCSS_STOPPED 0
  13 #define QCSS_STOPPING 1
  14 #define QCSS_NOT_STOPPED 2
  15 #define QCSS_HARDWARE_ERROR -1
  16 #define QCSS_HARDWARE_BUSY -2
  17
  18 static inline long poll_pending(void)
  19 {
  20         return plpar_hcall_norets(H_POLL_PENDING);
  21 }
  22
  23 static inline u8 get_cede_latency_hint(void)
  24 {
  25         return get_lppaca()->gpr5_dword.fields.cede_latency_hint;
  26 }
  27
  28 static inline void set_cede_latency_hint(u8 latency_hint)
  29 {
  30         get_lppaca()->gpr5_dword.fields.cede_latency_hint = latency_hint;
  31 }
  32
  33 static inline long cede_processor(void)
  34 {
  35         return plpar_hcall_norets(H_CEDE);
  36 }
  37
  38 static inline long extended_cede_processor(unsigned long latency_hint)
  39 {
  40         long rc;
  41         u8 old_latency_hint = get_cede_latency_hint();
  42
  43         set_cede_latency_hint(latency_hint);
  44         rc = cede_processor();
  45         set_cede_latency_hint(old_latency_hint);
  46
  47         return rc;
  48 }
  49
  50 static inline long vpa_call(unsigned long flags, unsigned long cpu,
  51                 unsigned long vpa)
  52 {
  53         /* flags are in bits 16-18 (counting from most significant bit) */
  54         flags = flags << (63 - 18);
  55
  56         return plpar_hcall_norets(H_REGISTER_VPA, flags, cpu, vpa);
  57 }
  58
  59 static inline long unregister_vpa(unsigned long cpu)
  60 {
  61         return vpa_call(0x5, cpu, 0);
  62 }
  63
  64 static inline long register_vpa(unsigned long cpu, unsigned long vpa)
  65 {
  66         return vpa_call(0x1, cpu, vpa);
  67 }
  68
  69 static inline long unregister_slb_shadow(unsigned long cpu)
  70 {
  71         return vpa_call(0x7, cpu, 0);
  72 }
  73
  74 static inline long register_slb_shadow(unsigned long cpu, unsigned long vpa)
  75 {
  76         return vpa_call(0x3, cpu, vpa);
  77 }
  78
  79 static inline long unregister_dtl(unsigned long cpu)
  80 {
  81         return vpa_call(0x6, cpu, 0);
  82 }
  83
  84 static inline long register_dtl(unsigned long cpu, unsigned long vpa)
  85 {
  86         return vpa_call(0x2, cpu, vpa);
  87 }
  88
  89 static inline long plpar_page_set_loaned(unsigned long vpa)
  90 {
  91         unsigned long cmo_page_sz = cmo_get_page_size();
  92         long rc = 0;
  93         int i;
  94
  95         for (i = 0; !rc && i < PAGE_SIZE; i += cmo_page_sz)
  96                 rc = plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_LOANED, vpa + i, 0);
  97
  98         for (i -= cmo_page_sz; rc && i != 0; i -= cmo_page_sz)
  99                 plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_ACTIVE,
 100                                    vpa + i - cmo_page_sz, 0);
 101
 102         return rc;
 103 }
 104
 105 static inline long plpar_page_set_active(unsigned long vpa)
 106 {
 107         unsigned long cmo_page_sz = cmo_get_page_size();
 108         long rc = 0;
 109         int i;
 110
 111         for (i = 0; !rc && i < PAGE_SIZE; i += cmo_page_sz)
 112                 rc = plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_ACTIVE, vpa + i, 0);
 113
 114         for (i -= cmo_page_sz; rc && i != 0; i -= cmo_page_sz)
 115                 plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_LOANED,
 116                                    vpa + i - cmo_page_sz, 0);
 117
 118         return rc;
 119 }
 120
 121 extern void vpa_init(int cpu);
 122
 123 static inline long plpar_pte_enter(unsigned long flags,
 124                 unsigned long hpte_group, unsigned long hpte_v,
 125                 unsigned long hpte_r, unsigned long *slot)
 126 {
 127         long rc;
 128         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 129
 130         rc = plpar_hcall(H_ENTER, retbuf, flags, hpte_group, hpte_v, hpte_r);
 131
 132         *slot = retbuf[0];
 133
 134         return rc;
 135 }
 136
 137 static inline long plpar_pte_remove(unsigned long flags, unsigned long ptex,
 138                 unsigned long avpn, unsigned long *old_pteh_ret,
 139                 unsigned long *old_ptel_ret)
 140 {
 141         long rc;
 142         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 143
 144         rc = plpar_hcall(H_REMOVE, retbuf, flags, ptex, avpn);
 145
 146         *old_pteh_ret = retbuf[0];
 147         *old_ptel_ret = retbuf[1];
 148
 149         return rc;
 150 }
 151
 152 /* plpar_pte_remove_raw can be called in real mode. It calls plpar_hcall_raw */
 153 static inline long plpar_pte_remove_raw(unsigned long flags, unsigned long ptex,
 154                 unsigned long avpn, unsigned long *old_pteh_ret,
 155                 unsigned long *old_ptel_ret)
 156 {
 157         long rc;
 158         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 159
 160         rc = plpar_hcall_raw(H_REMOVE, retbuf, flags, ptex, avpn);
 161
 162         *old_pteh_ret = retbuf[0];
 163         *old_ptel_ret = retbuf[1];
 164
 165         return rc;
 166 }
 167
 168 static inline long plpar_pte_read(unsigned long flags, unsigned long ptex,
 169                 unsigned long *old_pteh_ret, unsigned long *old_ptel_ret)
 170 {
 171         long rc;
 172         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 173
 174         rc = plpar_hcall(H_READ, retbuf, flags, ptex);
 175
 176         *old_pteh_ret = retbuf[0];
 177         *old_ptel_ret = retbuf[1];
 178
 179         return rc;
 180 }
 181
 182 /* plpar_pte_read_raw can be called in real mode. It calls plpar_hcall_raw */
 183 static inline long plpar_pte_read_raw(unsigned long flags, unsigned long ptex,
 184                 unsigned long *old_pteh_ret, unsigned long *old_ptel_ret)
 185 {
 186         long rc;
 187         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 188
 189         rc = plpar_hcall_raw(H_READ, retbuf, flags, ptex);
 190
 191         *old_pteh_ret = retbuf[0];
 192         *old_ptel_ret = retbuf[1];
 193
 194         return rc;
 195 }
 196
 197 /*
 198  * plpar_pte_read_4_raw can be called in real mode.
 199  * ptes must be 8*sizeof(unsigned long)
 200  */
 201 static inline long plpar_pte_read_4_raw(unsigned long flags, unsigned long ptex,
 202                                         unsigned long *ptes)
 203
 204 {
 205         long rc;
 206         unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
 207
 208         rc = plpar_hcall9_raw(H_READ, retbuf, flags | H_READ_4, ptex);
 209
 210         memcpy(ptes, retbuf, 8*sizeof(unsigned long));
 211
 212         return rc;
 213 }
 214
 215 static inline long plpar_pte_protect(unsigned long flags, unsigned long ptex,
 216                 unsigned long avpn)
 217 {
 218         return plpar_hcall_norets(H_PROTECT, flags, ptex, avpn);
 219 }
 220
 221 static inline long plpar_tce_get(unsigned long liobn, unsigned long ioba,
 222                 unsigned long *tce_ret)
 223 {
 224         long rc;
 225         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 226
 227         rc = plpar_hcall(H_GET_TCE, retbuf, liobn, ioba);
 228
 229         *tce_ret = retbuf[0];
 230
 231         return rc;
 232 }
 233
 234 static inline long plpar_tce_put(unsigned long liobn, unsigned long ioba,
 235                 unsigned long tceval)
 236 {
 237         return plpar_hcall_norets(H_PUT_TCE, liobn, ioba, tceval);
 238 }
 239
 240 static inline long plpar_tce_put_indirect(unsigned long liobn,
 241                 unsigned long ioba, unsigned long page, unsigned long count)
 242 {
 243         return plpar_hcall_norets(H_PUT_TCE_INDIRECT, liobn, ioba, page, count);
 244 }
 245
 246 static inline long plpar_tce_stuff(unsigned long liobn, unsigned long ioba,
 247                 unsigned long tceval, unsigned long count)
 248 {
 249         return plpar_hcall_norets(H_STUFF_TCE, liobn, ioba, tceval, count);
 250 }
 251
 252 static inline long plpar_get_term_char(unsigned long termno,
 253                 unsigned long *len_ret, char *buf_ret)
 254 {
 255         long rc;
 256         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 257         unsigned long *lbuf = (unsigned long *)buf_ret; /* TODO: alignment? */
 258
 259         rc = plpar_hcall(H_GET_TERM_CHAR, retbuf, termno);
 260
 261         *len_ret = retbuf[0];
 262         lbuf[0] = retbuf[1];
 263         lbuf[1] = retbuf[2];
 264
 265         return rc;
 266 }
 267
 268 static inline long plpar_put_term_char(unsigned long termno, unsigned long len,
 269                 const char *buffer)
 270 {
 271         unsigned long *lbuf = (unsigned long *)buffer;  /* TODO: alignment? */
 272         return plpar_hcall_norets(H_PUT_TERM_CHAR, termno, len, lbuf[0],
 273                         lbuf[1]);
 274 }
 275
 276 #endif /* _PSERIES_PLPAR_WRAPPERS_H */