2 * Platform dependent support for IO probing.
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35 #include <asm/sn/sn_sal.h>
38 * ia64_sn_probe_io_slot - test a memory location for readability
39 * @paddr: physical address to probe
40 * @size: number bytes to read (1,2,4,8)
41 * @data_ptr: address to store value read by probe (-1 returned if probe fails)
43 * This function will probe a physical address to determine if
44 * the address can be read. If reading the address causes a BUS
45 * error, an error is returned. If the probe succeeds, the contents
46 * of the memory location is returned.
49 * 0 - probe successful
50 * 1 - probe failed (generated MCA)
55 ia64_sn_probe_io_slot(long paddr, long size, void *data_ptr)
57 struct ia64_sal_retval isrv;
59 SAL_CALL(isrv, SN_SAL_PROBE, paddr, size, 0, 0, 0, 0, 0);
64 *((u8*)data_ptr) = (u8)isrv.v0;
67 *((u16*)data_ptr) = (u16)isrv.v0;
70 *((u32*)data_ptr) = (u32)isrv.v0;
73 *((u64*)data_ptr) = (u64)isrv.v0;