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Kernel: Validate HPET tick period

This commit is contained in:
Bananymous 2023-08-09 09:50:38 +03:00
parent e74fdbc55b
commit a5b1555725
1 changed files with 5 additions and 1 deletions
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6
kernel/kernel/Timer/HPET.cpp
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@ -68,10 +68,14 @@ namespace Kernel
m_counter_tick_period_fs = read_register(HPET_REG_CAPABILIES) >> 32; m_counter_tick_period_fs = read_register(HPET_REG_CAPABILIES) >> 32;
// period has to be less than 100 ns
if (m_counter_tick_period_fs == 0 || m_counter_tick_period_fs > FS_PER_NS * 100)
return BAN::Error::from_errno(EINVAL);
uint64_t ticks_per_ms = FS_PER_MS / m_counter_tick_period_fs; uint64_t ticks_per_ms = FS_PER_MS / m_counter_tick_period_fs;
{ {
const char* units[] = { "fs", "ps", "ns", "us", "ms", "s" }; const char* units[] = { "fs", "ps", "ns" };
int index = 0; int index = 0;
uint64_t temp = m_counter_tick_period_fs; uint64_t temp = m_counter_tick_period_fs;
while (temp >= 1000) while (temp >= 1000)