diff options
Diffstat (limited to 'lib/utils/fdt/fdt_helper.c')
| -rw-r--r-- | lib/utils/fdt/fdt_helper.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/lib/utils/fdt/fdt_helper.c b/lib/utils/fdt/fdt_helper.c index ce52fca..d390436 100644 --- a/lib/utils/fdt/fdt_helper.c +++ b/lib/utils/fdt/fdt_helper.c @@ -889,6 +889,60 @@ int fdt_parse_plmt_node(void *fdt, int nodeoffset, unsigned long *plmt_base, return 0; } +int fdt_parse_plicsw_node(void *fdt, int nodeoffset, unsigned long *plicsw_base, + unsigned long *size, u32 *hart_count) +{ + const fdt32_t *val; + int rc, i, count; + uint64_t reg_addr, reg_size, cpu_offset, cpu_intc_offset; + u32 phandle, hwirq, hartid, hcount; + + if (nodeoffset < 0 || !fdt || !plicsw_base || + !hart_count || !size) + return SBI_EINVAL; + + rc = fdt_get_node_addr_size(fdt, nodeoffset, 0, + ®_addr, ®_size); + if (rc < 0 || !plicsw_base || !size) + return SBI_ENODEV; + *plicsw_base = reg_addr; + *size = reg_size; + + val = fdt_getprop(fdt, nodeoffset, "interrupts-extended", &count); + if (!val || count < sizeof(fdt32_t)) + return 0; + count = count / sizeof(fdt32_t); + + hcount = 0; + for (i = 0; i < (count / 2); i++) { + phandle = fdt32_to_cpu(val[2 * i]); + hwirq = fdt32_to_cpu(val[2 * i + 1]); + + cpu_intc_offset = fdt_node_offset_by_phandle(fdt, phandle); + if (cpu_intc_offset < 0) + continue; + + cpu_offset = fdt_parent_offset(fdt, cpu_intc_offset); + if (cpu_intc_offset < 0) + continue; + + rc = fdt_parse_hart_id(fdt, cpu_offset, &hartid); + + if (rc) + continue; + + if (SBI_HARTMASK_MAX_BITS <= hartid) + continue; + + if (hwirq == IRQ_M_SOFT) + hcount++; + } + + *hart_count = hcount; + + return 0; +} + int fdt_parse_compat_addr(void *fdt, uint64_t *addr, const char *compatible) { |