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