tree 07a1398e798a731a5ca4b4113f357532c9ec8144
parent ab5d48596b630a4dbb7cc9231b5790a5ebaacca2
author Madhukar Pappireddy <madhukar.pappireddy@arm.com> 1573363688 -0600
committer Madhukar Pappireddy <madhukar.pappireddy@arm.com> 1574794590 -0600

Changes to support updated register usage in SMCCC v1.2

From AArch64 state, arguments are passed in registers W0-W7(X0-X7)
and results are returned in W0-W7(X0-X7) for SMC32(SMC64) calls.
From AArch32 state, arguments are passed in registers R0-R7 and
results are returned in registers R0-R7 for SMC32 calls.

Most of the functions and macros already existed to support using
upto 8 registers for passing/returning parameters/results. Added
few helper macros for SMC calls from AArch32 state.

Link to the specification:
https://developer.arm.com/docs/den0028/c

Change-Id: I87976b42454dc3fc45c8343e9640aa78210e9741
Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>