From: Erlon Cruz <erlon.c...@br.flextronics.com>
This h_call is useful for DLPAR in future amongst other things. Given an index
it fetches the corresponding PTE stored in the htab.
Signed-off-by: Erlon Cruz <erlon.c...@br.flextronics.com>
---
hw/spapr_hcall.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 58 insertions(+)
diff --git a/hw/spapr_hcall.c b/hw/spapr_hcall.c
index 2889742..5ba07e5 100644
--- a/hw/spapr_hcall.c
+++ b/hw/spapr_hcall.c
@@ -323,6 +323,63 @@ static target_ulong h_protect(PowerPCCPU *cpu,
sPAPREnvironment *spapr,
return H_SUCCESS;
}
+static target_ulong h_read(PowerPCCPU *cpu, sPAPREnvironment *spapr,
+ target_ulong opcode, target_ulong *args)
+{
+ CPUPPCState *env = &cpu->env;
+ target_ulong flags = args[0];
+ target_ulong pte_index = args[1];
+ uint8_t *hpte;
+
+ if ((pte_index * HASH_PTE_SIZE_64) & ~env->htab_mask) {
+ return H_PARAMETER;
+ }
+
+ if (!(flags & H_READ_4)) {
+ target_ulong v, r;
+ target_ulong *pteh = &args[0];
+ target_ulong *ptel = &args[1];
+
+ hpte = env->external_htab + (pte_index * HASH_PTE_SIZE_64);
+
+ v = ldq_p(hpte);
+ r = ldq_p(hpte + (HASH_PTE_SIZE_64/2));
+
+ if (flags & H_R_XLATE) {
+ /* FIXME: include a valid logical page num in the pte */
+ ;
+ }
+
+ *pteh = v;
+ *ptel = r;
+
+ } else {
+ int i, ridx = 0;
+ target_ulong v[4], r[4];
+
+ /* Clear the two low order bits */
+ pte_index &= ~(3ULL);
+ hpte = env->external_htab + (pte_index * HASH_PTE_SIZE_64);
+
+ for (i = 0; i < 4; i++) {
+ v[i] = ldq_p(hpte);
+ r[i] = ldq_p(hpte + (HASH_PTE_SIZE_64/2));
+
+ if (flags & H_R_XLATE) {
+ /* FIXME: include a valid logical page num in the pte */
+ ;
+ }
+
+ args[ridx++] = v[i];
+ args[ridx++] = r[i];
+
+ hpte += HASH_PTE_SIZE_64;
+ }
+ }
+
+ return H_SUCCESS;
+}
+
static target_ulong h_set_dabr(PowerPCCPU *cpu, sPAPREnvironment *spapr,
target_ulong opcode, target_ulong *args)
{
@@ -714,6 +771,7 @@ static void hypercall_register_types(void)
spapr_register_hypercall(H_ENTER, h_enter);
spapr_register_hypercall(H_REMOVE, h_remove);
spapr_register_hypercall(H_PROTECT, h_protect);
+ spapr_register_hypercall(H_READ, h_read);
/* hcall-bulk */
spapr_register_hypercall(H_BULK_REMOVE, h_bulk_remove);
--
1.7.9.5
