pmpcfg7
PMP Configuration Register 7
PMP entry configuration
Attributes
Defining Extension |
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CSR Address |
0x3a7 |
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Length |
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Privilege Mode |
M |
Software write
This CSR may store a value that is different from what software attempts to write.
When a software write occurs (e.g., through csrrw), the following determines the written value:
pmp28cfg = if ((CSR[pmpcfg7].pmp28cfg & 0x80) == 0) { # entry is not locked if (!(((csr_value.pmp28cfg & 0x1) == 0) && ((csr_value.pmp28cfg & 0x2) == 0x2))) { # not R = 0, W =1, which is reserved if ((PMP_GRANULARITY < 2) || ((csr_value.pmp28cfg & 0x18) != 0x10)) { # NA4 is not allowed when PMP granularity is larger than 4 bytes return csr_value.pmp28cfg; } } } # fall through: keep old value return CSR[pmpcfg7].pmp28cfg; pmp29cfg = if ((CSR[pmpcfg7].pmp29cfg & 0x80) == 0) { # entry is not locked if (!(((csr_value.pmp29cfg & 0x1) == 0) && ((csr_value.pmp29cfg & 0x2) == 0x2))) { # not R = 0, W =1, which is reserved if ((PMP_GRANULARITY < 2) || ((csr_value.pmp29cfg & 0x18) != 0x10)) { # NA4 is not allowed when PMP granularity is larger than 4 bytes return csr_value.pmp29cfg; } } } # fall through: keep old value return CSR[pmpcfg7].pmp29cfg; pmp30cfg = if ((CSR[pmpcfg7].pmp30cfg & 0x80) == 0) { # entry is not locked if (!(((csr_value.pmp30cfg & 0x1) == 0) && ((csr_value.pmp30cfg & 0x2) == 0x2))) { # not R = 0, W =1, which is reserved if ((PMP_GRANULARITY < 2) || ((csr_value.pmp30cfg & 0x18) != 0x10)) { # NA4 is not allowed when PMP granularity is larger than 4 bytes return csr_value.pmp30cfg; } } } # fall through: keep old value return CSR[pmpcfg7].pmp30cfg; pmp31cfg = if ((CSR[pmpcfg7].pmp31cfg & 0x80) == 0) { # entry is not locked if (!(((csr_value.pmp31cfg & 0x1) == 0) && ((csr_value.pmp31cfg & 0x2) == 0x2))) { # not R = 0, W =1, which is reserved if ((PMP_GRANULARITY < 2) || ((csr_value.pmp31cfg & 0x18) != 0x10)) { # NA4 is not allowed when PMP granularity is larger than 4 bytes return csr_value.pmp31cfg; } } } # fall through: keep old value return CSR[pmpcfg7].pmp31cfg;