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Currently, the platform's timer device is tracked in two places: the
core SBI implementation has `timer_dev`, and the FDT timer layer has
`current_driver`. The latter is used for warm initialization of the
timer device. However, this warm init is not specific to FDT-based
platforms; other platforms call exactly the same functions from the
same point in the boot sequence.
The code is simplified and made common across platforms by treating warm
init and exit as properties of the driver, not the platform. Then the
platform's only role is to select and prepare a driver during cold boot.
For now, only add a .warm_init hook, since none of the existing drivers
need an .exit hook. It could be added in the future if needed.
Signed-off-by: Samuel Holland <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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This patch adds unspecified permission flags for the PLICSW region
and updates the permission of the PLMT region.
With this update, both regions will become M-mode only read/write
regions in the root domain.
Domain0 Region00: 0x00000000f0300000-0x00000000f0300fff M: (I,R,W) S/U: (R,W)
Domain0 Region01: 0x0000000000040000-0x000000000005ffff M: (R,W) S/U: ()
Domain0 Region02: 0x0000000000000000-0x000000000003ffff M: (R,X) S/U: ()
> Domain0 Region03: 0x00000000e6000000-0x00000000e60fffff M: (I,R,W) S/U: ()
> Domain0 Region04: 0x00000000e6400000-0x00000000e67fffff M: (I,R,W) S/U: ()
Domain0 Region05: 0x0000000000000000-0xffffffffffffffff M: () S/U: (R,W,X)
The PMP rules of AE350-AX65 (single-core) w/ Smepmp:
p/x $pmpcfg0
$1 = {0x1f9b9b9d9b1e00,
pmp0cfg = {0x0},
L--AAXWR
pmp1cfg = {0x1e} (00011110), pmpaddr1: 0xf0300000 ~ 0xf0300fff (UART1)
pmp2cfg = {0x9b} (10011011), pmpaddr2: 0x40000 ~ 0x5ffff
pmp3cfg = {0x9d} (10011101), pmpaddr3: 0x0 ~ 0x3ffff
pmp4cfg = {0x9b} (10011011), pmpaddr4: 0xe6000000 ~ 0xe60fffff (PLMT)
pmp5cfg = {0x9b} (10011011), pmpaddr5: 0xe6400000 ~ 0xe67fffff (PLICSW)
pmp6cfg = {0x1f} (00011111), pmpaddr6: 0x0 ~ 0xffffffffff
pmp7cfg = {0x0 }}
The PMP rules of AE350-AX45MP (qual-core) w/o Smepmp:
p/x $pmpcfg0
$1 = {0x1f181818181b,
L--AAXWR
pmp0cfg = {0x1b}, (00011011), pmpaddr0: 0xf0300000 ~ 0xf0300fff (UART1)
pmp1cfg = {0x18}, (00011000), pmpaddr1: 0x40000 ~ 0x5ffff
pmp2cfg = {0x18}, (00011000), pmpaddr2: 0x0 ~ 0x3ffff
pmp3cfg = {0x18}, (00011000), pmpaddr3: 0xe6000000 ~ 0xe60fffff (PLMT)
pmp4cfg = {0x18}, (00011000), pmpaddr4: 0xe6400000 ~ 0xe67fffff (PLICSW)
pmp5cfg = {0x1f}, (00011111), pmpaddr5: 0x0 ~ 0x1ffffffff
pmp6cfg = {0x0 }}
Note that starting from this patch, we restrict the S/U-mode read
permission to the PLMT region, since we should read the TIME CSR
in a lower privilege mode.
Signed-off-by: Yu Chien Peter Lin <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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