Signed-off-by: Helge Deller <deller@gmx.de>
if (pdc_instr(&instr) == PDC_OK)
ivap[0] = instr;
+ /*
+ * Rules for the checksum of the HPMC handler:
+ * 1. The IVA does not point to PDC/PDH space (ie: the OS has installed
+ * its own IVA).
+ * 2. The word at IVA + 32 is nonzero.
+ * 3. If Length (IVA + 60) is not zero, then Length (IVA + 60) and
+ * Address (IVA + 56) are word-aligned.
+ * 4. The checksum of the 8 words starting at IVA + 32 plus the sum of
+ * the Length/4 words starting at Address is zero.
+ */
+
/* Compute Checksum for HPMC handler */
length = os_hpmc_size;
ivap[7] = length;