linux

Commit Graph

Author	SHA1	Message	Date
Carlo Caione	7a9bc330df	firmware: meson-sm: Allow 0 as valid return value Some special SMC calls (i.e. the function used to retrieve the serial number of the Amlogic SoCs) returns 0 in the register 0 also when the data was successfully read instead of using the register to hold the number of bytes returned in the bounce buffer as expected. With the current implementation of the driver this is seen as an error and meson_sm_call_read() returns an error even though the data was correctly read. To deal with this when we have no information about the amount of read data (that is 0 is returned by the SMC call) we return to the caller the requested amount of data and 0 as return value. Signed-off-by: Carlo Caione <carlo@endlessm.com> Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Kevin Hilman <khilman@baylibre.com>	2017-03-23 12:22:40 -07:00
Carlo Caione	83e007a0c6	firmware: meson-sm: Check for buffer output size After the data is read by the secure monitor driver it is being copied in the output buffer checking only the size of the bounce buffer but not the size of the output buffer. Fix this in the secure monitor driver slightly changing the API. Fix also the efuse driver that it is the only driver using this API to not break bisectability. Signed-off-by: Carlo Caione <carlo@endlessm.com> Acked-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> # for nvmem Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Kevin Hilman <khilman@baylibre.com>	2017-03-23 12:22:32 -07:00
Carlo Caione	2c4ddb2155	firmware: Amlogic: Add secure monitor driver Introduce a driver to provide calls into secure monitor mode. In the Amlogic SoCs these calls are used for multiple reasons: access to NVMEM, set USB boot, enable JTAG, etc... Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Carlo Caione <carlo@endlessm.com> [khilman: add in SZ_4K cleanup] Signed-off-by: Kevin Hilman <khilman@baylibre.com>	2016-09-01 14:23:39 -07:00

Author

SHA1

Message

Date

Carlo Caione

7a9bc330df

firmware: meson-sm: Allow 0 as valid return value

Some special SMC calls (i.e. the function used to retrieve the serial
number of the Amlogic SoCs) returns 0 in the register 0 also when the
data was successfully read instead of using the register to hold the
number of bytes returned in the bounce buffer as expected.

With the current implementation of the driver this is seen as an error
and meson_sm_call_read() returns an error even though the data was
correctly read.

To deal with this when we have no information about the amount of read
data (that is 0 is returned by the SMC call) we return to the caller
the requested amount of data and 0 as return value.

Signed-off-by: Carlo Caione <carlo@endlessm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

2017-03-23 12:22:40 -07:00

Carlo Caione

83e007a0c6

firmware: meson-sm: Check for buffer output size

After the data is read by the secure monitor driver it is being copied
in the output buffer checking only the size of the bounce buffer but not
the size of the output buffer.

Fix this in the secure monitor driver slightly changing the API. Fix
also the efuse driver that it is the only driver using this API to not
break bisectability.

Signed-off-by: Carlo Caione <carlo@endlessm.com>
Acked-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> # for nvmem
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

2017-03-23 12:22:32 -07:00

Carlo Caione

2c4ddb2155

firmware: Amlogic: Add secure monitor driver

Introduce a driver to provide calls into secure monitor mode.

In the Amlogic SoCs these calls are used for multiple reasons: access to
NVMEM, set USB boot, enable JTAG, etc...

Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Carlo Caione <carlo@endlessm.com>
[khilman: add in SZ_4K cleanup]
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

2016-09-01 14:23:39 -07:00

3 Commits