feat(ast2700): set up CPU clock frequency by SCU

Modify generic timer frequency by SCU setting
1. check SCU_CPU_HW_STRAP1 using HPLL or MPLL
SCU_CPU_HW_STRAP1[4]=1, using HPLL
SCU_CPU_HW_STRAP1[

feat(ast2700): set up CPU clock frequency by SCU

Modify generic timer frequency by SCU setting
1. check SCU_CPU_HW_STRAP1 using HPLL or MPLL
SCU_CPU_HW_STRAP1[4]=1, using HPLL
SCU_CPU_HW_STRAP1[4]=0, using MPLL

2. read HPLL or MPLL
HPLL: frequency setting in SCU_CPU_HW_STRAP1[2:3]
MPLL: CLKIN_25M with mul and div setting from SCU_CPU_MPLL

Change-Id: I31eb10107b9da7c6746887ba36ead8ca61d86aae
Signed-off-by: Kevin Chen <kevin_chen@aspeedtech.com>

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refactor(ast2700): adopt RESET_TO_BL31 boot flow

Revise the AST2700 boot flow to the RESET_TO_BL31 scheme.
The execution of BL1/2 can be saved from ARM CA35 while most
low level platform initializat

refactor(ast2700): adopt RESET_TO_BL31 boot flow

Revise the AST2700 boot flow to the RESET_TO_BL31 scheme.
The execution of BL1/2 can be saved from ARM CA35 while most
low level platform initialization are moved to a preceding MCU.

This patch updates the build configuration and also adds
the SMP mailbox setup code to hold secondary cores until
they are being waken up.

Signed-off-by: Chia-Wei Wang <chiawei_wang@aspeedtech.com>
Change-Id: I7e0aa6416b92b97036153db1d9a26baaa41b7b18

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refactor(ast2700): update memory layout

Update the memory layout for both BL31 and BL32 FW based on
the 1GB DRAM space of the AST2700 EVB.

Minor:
- Use SZ_xx macro to define size for better readab

refactor(ast2700): update memory layout

Update the memory layout for both BL31 and BL32 FW based on
the 1GB DRAM space of the AST2700 EVB.

Minor:
- Use SZ_xx macro to define size for better readability

Signed-off-by: Chia-Wei Wang <chiawei_wang@aspeedtech.com>
Change-Id: I6d8285bd675321f615bb67cdd27bb4b6cb4c8b16

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feat(ast2700): add Aspeed AST2700 platform support

Aspeed AST2700 is a quad-core SoC with ARM Cortex-A35 integrated.
This patch adds the initial platform support for AST2700 and also
updates the doc

feat(ast2700): add Aspeed AST2700 platform support

Aspeed AST2700 is a quad-core SoC with ARM Cortex-A35 integrated.
This patch adds the initial platform support for AST2700 and also
updates the documents.

Change-Id: I1796f7aae5ed2d1799e91fabb8949607959cd9b3
Signed-off-by: Chia-Wei Wang <chiawei_wang@aspeedtech.com>

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