diff options
Diffstat (limited to 'lib/utils/timer/fdt_timer_mtimer.c')
| -rw-r--r-- | lib/utils/timer/fdt_timer_mtimer.c | 30 |
1 files changed, 20 insertions, 10 deletions
diff --git a/lib/utils/timer/fdt_timer_mtimer.c b/lib/utils/timer/fdt_timer_mtimer.c index 7b8546b0..a0adc70e 100644 --- a/lib/utils/timer/fdt_timer_mtimer.c +++ b/lib/utils/timer/fdt_timer_mtimer.c @@ -18,6 +18,7 @@ struct timer_mtimer_quirks { unsigned int mtime_offset; bool has_64bit_mmio; + bool without_mtime; }; static unsigned long mtimer_count = 0; @@ -53,12 +54,16 @@ static int timer_mtimer_cold_init(void *fdt, int nodeoff, /* Set CLINT addresses */ mt->mtimecmp_addr = addr[0] + ACLINT_DEFAULT_MTIMECMP_OFFSET; mt->mtimecmp_size = ACLINT_DEFAULT_MTIMECMP_SIZE; - mt->mtime_addr = addr[0] + ACLINT_DEFAULT_MTIME_OFFSET; - mt->mtime_size = size[0] - mt->mtimecmp_size; - /* Adjust MTIMER address and size for CLINT device */ - mt->mtime_addr += quirks->mtime_offset; + if (!quirks->without_mtime) { + mt->mtime_addr = addr[0] + ACLINT_DEFAULT_MTIME_OFFSET; + mt->mtime_size = size[0] - mt->mtimecmp_size; + /* Adjust MTIMER address and size for CLINT device */ + mt->mtime_addr += quirks->mtime_offset; + mt->mtime_size -= quirks->mtime_offset; + } else { + mt->mtime_addr = mt->mtime_size = 0; + } mt->mtimecmp_addr += quirks->mtime_offset; - mt->mtime_size -= quirks->mtime_offset; /* Apply additional CLINT quirks */ mt->has_64bit_mmio = quirks->has_64bit_mmio; } else { /* RISC-V ACLINT MTIMER */ @@ -70,12 +75,17 @@ static int timer_mtimer_cold_init(void *fdt, int nodeoff, } /* Check if MTIMER device has shared MTIME address */ - mt->has_shared_mtime = false; - for (i = 0; i < mtimer_count; i++) { - if (mtimer[i].mtime_addr == mt->mtime_addr) { - mt->has_shared_mtime = true; - break; + if (mt->mtime_size) { + mt->has_shared_mtime = false; + for (i = 0; i < mtimer_count; i++) { + if (mtimer[i].mtime_addr == mt->mtime_addr) { + mt->has_shared_mtime = true; + break; + } } + } else { + /* Assume shared time CSR */ + mt->has_shared_mtime = true; } /* Initialize the MTIMER device */ |