arch/powerpc/platforms/pseries/plpar_wrappers.h

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