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On 32-core platform, hart31 gets stuck at secondary_hart_loop
as the corresponding enable bit is not set in enable_ipi().
We should program the next word (0x2f84) which is assigned
as the enable register of hart31. It should be done in the same
way when we invoke riscv_send_ipi() to trigger software interrupt
on hart31.
The following diagram shows the enable bits of the fixed PLICSW
scheme.
Pending regs: 0x1000 x---0---0---0---0------0---0
Pending hart ID: 0 1 2 3 ... 30 31
Interrupt ID: 0 1 2 3 4 ... 31 32
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Enable regs: 0x2000 x---1---0---0---0-...--0---0---> hart0
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0x2080 x---0---1---0---0-...--0---0---> hart1
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0x2100 x---0---0---1---0-...--0---0---> hart2
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0x2180 x---0---0---0---1-...--0---0---> hart3
. . . . . . .
. . . . . . .
. . . . . . .
0x2f00 x---0---0---0---0-...--1---0---> hart30
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0x2f80 x---0---0---0---0-...--0---1---> hart31
<-------- word 0 -------><--- word 1 --->
This patch includes some cleanups to macros/functions.
Fixes: ebf11273220a ("riscv: andes: Rearrange Andes PLICSW to single-bit-per-hart strategy")
Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Randolph <randolph@andestech.com>
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We can remove common.h from most cases of the code here, and only a few
places need an additional header instead.
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Rick Chen <rick@andestech.com>
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Source hart information is not necessary in IPI, so we could
use single-bit-per-hart strategy to rearrange PLICSW mapping.
Bit 0 of Interrupt Pending Bits is hardwired to 0.
Therefore, we use bit 1 to send IPI to hart 0,
bit 2 to hart 1, ..., and so on.
Signed-off-by: Randolph <randolph@andestech.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
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On some AE350 boards, we need to explicitly initialize the priority
registers to a non-zero value so the boot hart can instruct secondary
harts to jump to OpenSBI.
This patch also updates the information about PLICSW.
Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
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As PLICSW is used to trigger the software interrupt, we should rename
Andes PLIC configuration and file name to reflect the usage. This patch
also updates PLMT and PLICSW compatible strings to be consistent with
OpenSBI fdt driver.
Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Rick Chen <rick@andestech.com>
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