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