Non-volatile memory access control
First Claim
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1. A method for controlling access to non-volatile memory, said method comprising the steps of:
- receiving a request for access to non-volatile memory;
responsive to receiving the request, determining whether to delay access to the non-volatile memory; and
maintaining a counter for a block of the non-volatile memory, wherein the counter includes a threshold counter value that divides the counter into a delayed access portion and a non-delayed access portion, wherein counter values in the delayed access portion results in a defined delay in access in response to an access request, wherein counter values at the threshold counter value and in the non-delayed access portion results in no defined delay in access in response to an access request.
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Abstract
A system is described for controlling access to non-volatile memory. The system can include logic configured to determine whether to delay access to the non-volatile memory.
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Citations
27 Claims
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1. A method for controlling access to non-volatile memory, said method comprising the steps of:
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receiving a request for access to non-volatile memory;
responsive to receiving the request, determining whether to delay access to the non-volatile memory; and
maintaining a counter for a block of the non-volatile memory, wherein the counter includes a threshold counter value that divides the counter into a delayed access portion and a non-delayed access portion, wherein counter values in the delayed access portion results in a defined delay in access in response to an access request, wherein counter values at the threshold counter value and in the non-delayed access portion results in no defined delay in access in response to an access request. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for controlling access to non-volatile memory, said method comprising the steps of:
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receiving a request for access to non-volatile memory; and
responsive to receiving the request, enabling access to the non-volatile memory in intervals of lifecycle ticks, wherein the lifecycle ticks are determined by dividing a design life of the non-volatile memory by maximum specified access cycles. - View Dependent Claims (12)
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13. A method for controlling access to non-volatile memory, said method comprising the steps of:
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receiving a request for access to a block of non-volatile memory;
maintaining a counter for a block of the non-volatile memory, wherein the counter includes a threshold counter value that divides the counter into a delayed access portion and a non-delayed access portion, wherein counter values in the delayed access portion results in a defined delay in access in response to an access request, wherein counter values at the threshold counter value and in the non-delayed access portion results in no defined delay in access in response to an access request;
responsive to receiving the request, determining whether to delay access to the non-volatile memory;
delaying access to the non-volatile memory by a defined delay value if a current counter value is above the threshold counter value, wherein the defined delay value is determined by subtracting the threshold counter value from a current counter value, dividing the difference by the difference between a total counter value and the threshold counter value, and multiplying the quotient by a lifecycle tick, wherein the lifecycle tick is determined by dividing a design life of the non-volatile memory by maximum specified access cycles;
incrementing the counter after each access;
decrementing the counter after each lifecycle tick; and
delaying access within the lifecycle tick until up to a maximum delay equal to the lifecycle tick.
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14. A system for controlling access to non-volatile memory, said system comprising:
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a non-volatile memory having an access block;
a counter for the access block;
access manager logic configured to receive a request for access to the access block of the non-volatile memory and, responsive to receiving the request, determine whether to delay access to the access block of the non-volatile memory; and
wherein the access manager logic further includes counter manager logic configured to track the counter for the access block, wherein the counter includes a threshold counter value that divides the counter into a delayed access portion and a non-delayed access portion, wherein counter values in the delayed access portion results in a defined delay in access in response to an access request, wherein counter values at the threshold counter value and in the non-delayed access portion results in no defined delay in access in response to an access request. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A system for controlling access to non-volatile memory, said system comprising:
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a non-volatile memory having at least one access block;
a counter for the access block; and
access manager logic configured to receive a request for access to the access block of the non-volatile memory and, responsive to receiving the request, enable access to the access block of the non-volatile memory in intervals of lifecycle ticks, wherein the lifecycle ticks are determined by dividing a design life of the non-volatile memory by maximum specified access cycles. - View Dependent Claims (25)
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26. A system for controlling access to non-volatile memory, said system comprising:
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a non-volatile memory having an access block;
a counter for the access block, wherein the counter includes a threshold counter value that divides the counter into a delayed access portion and a non-delayed access portion, wherein counter values in the delayed access portion results in a defined delay in access in response to an access request, wherein counter values at the threshold counter value and in the non-delayed access portion results in no defined delay in access in response to an access request, wherein the counter is incremented after each access, wherein the counter is decremented after each lifecycle tick, wherein the lifecycle tick is determined by dividing a design life of the non-volatile memory by maximum specified access cycles;
access manager logic including counter manager logic and delay determiner logic, wherein the counter manager logic is configured to track the counter for the access block, wherein the access manager logic is configured to receive a request for access to the access block of the non-volatile memory and, responsive to receiving the request, determine whether to delay access to the access block of the non-volatile memory, wherein the access manager logic is further configured to delay access to the access block of the non-volatile memory by a defined delay value if a current counter value is above the threshold counter value, wherein the access manager logic is further configured to delay access within a lifecycle tick until up to a maximum delay equal to the lifecycle tick, wherein the delay determiner logic is configured to calculate the defined delay value by subtracting the threshold counter value from a current counter value, dividing the difference by the difference between a total counter value and the threshold counter value, and multiplying the quotient by the lifecycle tick.
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27. A system for controlling access to non-volatile memory on a computer-readable medium, said system comprising:
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logic configured to receive a request for access to non-volatile memory;
logic configured to determine whether to delay access to an access block of the non-volatile memory in response to an access request; and
wherein the logic configured to determine is further configured to delay access to the access block of the non-volatile memory by a defined delay value if a current counter value is above a threshold counter value, wherein the logic configured to determine is further configured to delay access within a lifecycle tick until up to a maximum delay equal to a lifecycle tick, wherein the lifecycle tick is determined by dividing a design life of the non-volatile memory by maximum specified access cycles.
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Specification