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lib: utils/sys: Extend HTIF library to allow custom base address

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Some of RISC-V emulators provide HTIF at fixed base address so for
such emulators users have to hard-code HTIF base address in the
linker script.

To address this problem, we let users optionally provide fixed HTIF
base address via platform support (or device tree).

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Dong Du <Dd_nirvana@sjtu.edu.cn>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
This commit is contained in:
Anup Patel
2022-01-06 09:16:55 +05:30
committed by Anup Patel
parent 5b9960379f
commit 6dde43584f
4 changed files with 103 additions and 14 deletions
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12
lib/utils/serial/fdt_serial_htif.c
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@@ -19,7 +19,17 @@ static const struct fdt_match serial_htif_match[] = {
static int serial_htif_init(void *fdt, int nodeoff,
const struct fdt_match *match)
{
return htif_serial_init();
bool custom = false;
uint64_t fromhost_addr = 0, tohost_addr = 0;
if (!fdt_get_node_addr_size(fdt, nodeoff, 0, &fromhost_addr, NULL)) {
custom = true;
tohost_addr = fromhost_addr + sizeof(uint64_t);
}
fdt_get_node_addr_size(fdt, nodeoff, 1, &tohost_addr, NULL);
return htif_serial_init(custom, fromhost_addr, tohost_addr);
}
struct fdt_serial fdt_serial_htif = {