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firmware: scm: Add new SCM call API for switching memory ownership

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Two different processors on a SOC need to switch memory ownership
during load/unload. To enable this, second level memory map table
need to be updated, which is done by secure layer.
This patch adds the interface for making secure monitor call for
memory ownership switching request.

Acked-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Avaneesh Kumar Dwivedi <akdwived@codeaurora.org>
[bjorn: Minor style and kerneldoc updates]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Avaneesh Kumar Dwivedi
2017-10-24 21:22:24 +05:30
committed by Bjorn Andersson
parent 33d930e59a
commit d82bd35997
5 changed files with 150 additions and 0 deletions
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27
drivers/firmware/qcom_scm-64.c
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@@ -382,6 +382,33 @@ int __qcom_scm_set_remote_state(struct device *dev, u32 state, u32 id)
return ret ? : res.a1;
}
int __qcom_scm_assign_mem(struct device *dev, phys_addr_t mem_region,
size_t mem_sz, phys_addr_t src, size_t src_sz,
phys_addr_t dest, size_t dest_sz)
{
int ret;
struct qcom_scm_desc desc = {0};
struct arm_smccc_res res;
desc.args[0] = mem_region;
desc.args[1] = mem_sz;
desc.args[2] = src;
desc.args[3] = src_sz;
desc.args[4] = dest;
desc.args[5] = dest_sz;
desc.args[6] = 0;
desc.arginfo = QCOM_SCM_ARGS(7, QCOM_SCM_RO, QCOM_SCM_VAL,
QCOM_SCM_RO, QCOM_SCM_VAL, QCOM_SCM_RO,
QCOM_SCM_VAL, QCOM_SCM_VAL);
ret = qcom_scm_call(dev, QCOM_SCM_SVC_MP,
QCOM_MEM_PROT_ASSIGN_ID,
&desc, &res);
return ret ? : res.a1;
}
int __qcom_scm_restore_sec_cfg(struct device *dev, u32 device_id, u32 spare)
{
struct qcom_scm_desc desc = {0};