idl: add indirect csr access; do direct csr access with functions

This does three things:

* Remove `CSR[expression]` syntax for direct CSR reads
** `CSR[csr_name]` still works
* Adds `direct_csr_lookup`/`csr_{hw,sw}_{read,write}` functions to access a
  CSR with a direct address
* Adds `indirect_csr_lookup` to access an indirect CSR with an indirect address

Author: dhower-qc

arch/csr/Zihpm/hpmcounter10h.yaml

@@ -7,7 +7,6 @@ kind: csr
 name: hpmcounter10h
 long_name: User-mode Hardware Performance Counter 7, high half
 address: 0xC8A
-base: 32
 description: |
   Alias for M-mode CSR `mhpmcounter10h`.
 

arch/csr/Zihpm/hpmcounter11h.yaml

@@ -7,7 +7,6 @@ kind: csr
 name: hpmcounter11h
 long_name: User-mode Hardware Performance Counter 8, high half
 address: 0xC8B
-base: 32
 description: |
   Alias for M-mode CSR `mhpmcounter11h`.
 

arch/csr/Zihpm/hpmcounter12h.yaml

@@ -7,7 +7,6 @@ kind: csr
 name: hpmcounter12h
 long_name: User-mode Hardware Performance Counter 9, high half
 address: 0xC8C
-base: 32
 description: |
   Alias for M-mode CSR `mhpmcounter12h`.
 

arch/csr/Zihpm/hpmcounter13h.yaml

@@ -7,7 +7,6 @@ kind: csr
 name: hpmcounter13h
 long_name: User-mode Hardware Performance Counter 10, high half
 address: 0xC8D
-base: 32
 description: |
   Alias for M-mode CSR `mhpmcounter13h`.
 

arch/csr/Zihpm/hpmcounter14h.yaml

@@ -7,7 +7,6 @@ kind: csr
 name: hpmcounter14h
 long_name: User-mode Hardware Performance Counter 11, high half
 address: 0xC8E
-base: 32
 description: |
   Alias for M-mode CSR `mhpmcounter14h`.
 

arch/csr/Zihpm/hpmcounter15h.yaml

@@ -7,7 +7,6 @@ kind: csr
 name: hpmcounter15h
 long_name: User-mode Hardware Performance Counter 12, high half
 address: 0xC8F
-base: 32
 description: |
   Alias for M-mode CSR `mhpmcounter15h`.
 

arch/csr/Zihpm/hpmcounter16h.yaml

@@ -7,7 +7,6 @@ kind: csr
 name: hpmcounter16h
 long_name: User-mode Hardware Performance Counter 13, high half
 address: 0xC90
-base: 32
 description: |
   Alias for M-mode CSR `mhpmcounter16h`.
 

arch/csr/Zihpm/hpmcounter17h.yaml

@@ -7,7 +7,6 @@ kind: csr
 name: hpmcounter17h
 long_name: User-mode Hardware Performance Counter 14, high half
 address: 0xC91
-base: 32
 description: |
   Alias for M-mode CSR `mhpmcounter17h`.
 

arch/csr/Zihpm/hpmcounter18h.yaml

@@ -7,7 +7,6 @@ kind: csr
 name: hpmcounter18h
 long_name: User-mode Hardware Performance Counter 15, high half
 address: 0xC92
-base: 32
 description: |
   Alias for M-mode CSR `mhpmcounter18h`.
 

arch/csr/Zihpm/hpmcounter19h.yaml

@@ -7,7 +7,6 @@ kind: csr
 name: hpmcounter19h
 long_name: User-mode Hardware Performance Counter 16, high half
 address: 0xC93
-base: 32
 description: |
   Alias for M-mode CSR `mhpmcounter19h`.