Remove the troublesome union hob_pointers so that some annoying casts
are no longer needed in those hob access routines. This also improves
the readability.
Signed-off-by: Bin Meng <bmeng.cn(a)gmail.com>
---
arch/x86/cpu/queensbay/fsp_support.c | 95 ++++++++++++----------
arch/x86/cpu/queensbay/tnc_dram.c | 39 +++++----
arch/x86/include/asm/arch-queensbay/fsp/fsp_hob.h | 46 ++++-------
.../include/asm/arch-queensbay/fsp/fsp_support.h | 5 +-
arch/x86/lib/cmd_hob.c | 16 ++--
5 files changed, 101 insertions(+), 100 deletions(-)
diff --git a/arch/x86/cpu/queensbay/fsp_support.c b/arch/x86/cpu/queensbay/fsp_support.c
index ef1916b..4764e3c 100644
--- a/arch/x86/cpu/queensbay/fsp_support.c
+++ b/arch/x86/cpu/queensbay/fsp_support.c
@@ -231,26 +231,28 @@ u32 fsp_notify(struct fsp_header *fsp_hdr, u32 phase)
u32 fsp_get_usable_lowmem_top(const void *hob_list)
{
- union hob_pointers hob;
+ const struct hob_header *hdr;
+ struct hob_res_desc *res_desc;
phys_addr_t phys_start;
u32 top;
/* Get the HOB list for processing */
- hob.raw = (void *)hob_list;
+ hdr = hob_list;
/* * Collect memory ranges */
top = FSP_LOWMEM_BASE;
- while (!end_of_hob(hob)) {
- if (get_hob_type(hob) == HOB_TYPE_RES_DESC) {
- if (hob.res_desc->type == RES_SYS_MEM) {
- phys_start = hob.res_desc->phys_start;
+ while (!end_of_hob(hdr)) {
+ if (get_hob_type(hdr) == HOB_TYPE_RES_DESC) {
+ res_desc = (struct hob_res_desc *)hdr;
+ if (res_desc->type == RES_SYS_MEM) {
+ phys_start = res_desc->phys_start;
/* Need memory above 1MB to be collected here */
if (phys_start >= FSP_LOWMEM_BASE &&
phys_start < (phys_addr_t)FSP_HIGHMEM_BASE)
- top += (u32)(hob.res_desc->len);
+ top += (u32)(res_desc->len);
}
}
- hob.raw = get_next_hob(hob);
+ hdr = get_next_hob(hdr);
}
return top;
@@ -258,25 +260,27 @@ u32 fsp_get_usable_lowmem_top(const void *hob_list)
u64 fsp_get_usable_highmem_top(const void *hob_list)
{
- union hob_pointers hob;
+ const struct hob_header *hdr;
+ struct hob_res_desc *res_desc;
phys_addr_t phys_start;
u64 top;
/* Get the HOB list for processing */
- hob.raw = (void *)hob_list;
+ hdr = hob_list;
/* Collect memory ranges */
top = FSP_HIGHMEM_BASE;
- while (!end_of_hob(hob)) {
- if (get_hob_type(hob) == HOB_TYPE_RES_DESC) {
- if (hob.res_desc->type == RES_SYS_MEM) {
- phys_start = hob.res_desc->phys_start;
+ while (!end_of_hob(hdr)) {
+ if (get_hob_type(hdr) == HOB_TYPE_RES_DESC) {
+ res_desc = (struct hob_res_desc *)hdr;
+ if (res_desc->type == RES_SYS_MEM) {
+ phys_start = res_desc->phys_start;
/* Need memory above 1MB to be collected here */
if (phys_start >= (phys_addr_t)FSP_HIGHMEM_BASE)
- top += (u32)(hob.res_desc->len);
+ top += (u32)(res_desc->len);
}
}
- hob.raw = get_next_hob(hob);
+ hdr = get_next_hob(hdr);
}
return top;
@@ -285,24 +289,26 @@ u64 fsp_get_usable_highmem_top(const void *hob_list)
u64 fsp_get_reserved_mem_from_guid(const void *hob_list, u64 *len,
struct efi_guid *guid)
{
- union hob_pointers hob;
+ const struct hob_header *hdr;
+ struct hob_res_desc *res_desc;
/* Get the HOB list for processing */
- hob.raw = (void *)hob_list;
+ hdr = hob_list;
/* Collect memory ranges */
- while (!end_of_hob(hob)) {
- if (get_hob_type(hob) == HOB_TYPE_RES_DESC) {
- if (hob.res_desc->type == RES_MEM_RESERVED) {
- if (compare_guid(&hob.res_desc->owner, guid)) {
+ while (!end_of_hob(hdr)) {
+ if (get_hob_type(hdr) == HOB_TYPE_RES_DESC) {
+ res_desc = (struct hob_res_desc *)hdr;
+ if (res_desc->type == RES_MEM_RESERVED) {
+ if (compare_guid(&res_desc->owner, guid)) {
if (len)
- *len = (u32)(hob.res_desc->len);
+ *len = (u32)(res_desc->len);
- return (u64)(hob.res_desc->phys_start);
+ return (u64)(res_desc->phys_start);
}
}
}
- hob.raw = get_next_hob(hob);
+ hdr = get_next_hob(hdr);
}
return 0;
@@ -336,44 +342,45 @@ u32 fsp_get_tseg_reserved_mem(const void *hob_list, u32 *len)
return base;
}
-void *fsp_get_next_hob(u16 type, const void *hob_list)
+const struct hob_header *fsp_get_next_hob(u16 type, const void *hob_list)
{
- union hob_pointers hob;
+ const struct hob_header *hdr;
- assert(hob_list != NULL);
-
- hob.raw = (u8 *)hob_list;
+ hdr = hob_list;
/* Parse the HOB list until end of list or matching type is found */
- while (!end_of_hob(hob)) {
- if (get_hob_type(hob) == type)
- return hob.raw;
+ while (!end_of_hob(hdr)) {
+ if (get_hob_type(hdr) == type)
+ return hdr;
- hob.raw = get_next_hob(hob);
+ hdr = get_next_hob(hdr);
}
return NULL;
}
-void *fsp_get_next_guid_hob(const struct efi_guid *guid, const void *hob_list)
+const struct hob_header *fsp_get_next_guid_hob(const struct efi_guid *guid,
+ const void *hob_list)
{
- union hob_pointers hob;
-
- hob.raw = (u8 *)hob_list;
- while ((hob.raw = fsp_get_next_hob(HOB_TYPE_GUID_EXT,
- hob.raw)) != NULL) {
- if (compare_guid(guid, &hob.guid->name))
+ const struct hob_header *hdr;
+ struct hob_guid *guid_hob;
+
+ hdr = hob_list;
+ while ((hdr = fsp_get_next_hob(HOB_TYPE_GUID_EXT,
+ hdr)) != NULL) {
+ guid_hob = (struct hob_guid *)hdr;
+ if (compare_guid(guid, &(guid_hob->name)))
break;
- hob.raw = get_next_hob(hob);
+ hdr = get_next_hob(hdr);
}
- return hob.raw;
+ return hdr;
}
void *fsp_get_guid_hob_data(const void *hob_list, u32 *len,
struct efi_guid *guid)
{
- u8 *guid_hob;
+ const struct hob_header *guid_hob;
guid_hob = fsp_get_next_guid_hob(guid, hob_list);
if (guid_hob == NULL) {
diff --git a/arch/x86/cpu/queensbay/tnc_dram.c b/arch/x86/cpu/queensbay/tnc_dram.c
index 8e97c9b..b669dbc 100644
--- a/arch/x86/cpu/queensbay/tnc_dram.c
+++ b/arch/x86/cpu/queensbay/tnc_dram.c
@@ -14,17 +14,19 @@ DECLARE_GLOBAL_DATA_PTR;
int dram_init(void)
{
phys_size_t ram_size = 0;
- union hob_pointers hob;
+ const struct hob_header *hdr;
+ struct hob_res_desc *res_desc;
- hob.raw = gd->arch.hob_list;
- while (!end_of_hob(hob)) {
- if (get_hob_type(hob) == HOB_TYPE_RES_DESC) {
- if (hob.res_desc->type == RES_SYS_MEM ||
- hob.res_desc->type == RES_MEM_RESERVED) {
- ram_size += hob.res_desc->len;
+ hdr = gd->arch.hob_list;
+ while (!end_of_hob(hdr)) {
+ if (get_hob_type(hdr) == HOB_TYPE_RES_DESC) {
+ res_desc = (struct hob_res_desc *)hdr;
+ if (res_desc->type == RES_SYS_MEM ||
+ res_desc->type == RES_MEM_RESERVED) {
+ ram_size += res_desc->len;
}
}
- hob.raw = get_next_hob(hob);
+ hdr = get_next_hob(hdr);
}
gd->ram_size = ram_size;
@@ -55,22 +57,23 @@ ulong board_get_usable_ram_top(ulong total_size)
unsigned install_e820_map(unsigned max_entries, struct e820entry *entries)
{
unsigned num_entries = 0;
+ const struct hob_header *hdr;
+ struct hob_res_desc *res_desc;
- union hob_pointers hob;
+ hdr = gd->arch.hob_list;
- hob.raw = gd->arch.hob_list;
+ while (!end_of_hob(hdr)) {
+ if (get_hob_type(hdr) == HOB_TYPE_RES_DESC) {
+ res_desc = (struct hob_res_desc *)hdr;
+ entries[num_entries].addr = res_desc->phys_start;
+ entries[num_entries].size = res_desc->len;
- while (!end_of_hob(hob)) {
- if (get_hob_type(hob) == HOB_TYPE_RES_DESC) {
- entries[num_entries].addr = hob.res_desc->phys_start;
- entries[num_entries].size = hob.res_desc->len;
-
- if (hob.res_desc->type == RES_SYS_MEM)
+ if (res_desc->type == RES_SYS_MEM)
entries[num_entries].type = E820_RAM;
- else if (hob.res_desc->type == RES_MEM_RESERVED)
+ else if (res_desc->type == RES_MEM_RESERVED)
entries[num_entries].type = E820_RESERVED;
}
- hob.raw = get_next_hob(hob);
+ hdr = get_next_hob(hdr);
num_entries++;
}
diff --git a/arch/x86/include/asm/arch-queensbay/fsp/fsp_hob.h b/arch/x86/include/asm/arch-queensbay/fsp/fsp_hob.h
index 380b64e..5110361 100644
--- a/arch/x86/include/asm/arch-queensbay/fsp/fsp_hob.h
+++ b/arch/x86/include/asm/arch-queensbay/fsp/fsp_hob.h
@@ -182,15 +182,6 @@ struct hob_guid {
/* GUID specific data goes here */
};
-/* Union of all the possible HOB Types */
-union hob_pointers {
- struct hob_header *hdr;
- struct hob_mem_alloc *mem_alloc;
- struct hob_res_desc *res_desc;
- struct hob_guid *guid;
- u8 *raw;
-};
-
/**
* get_hob_type() - return the type of a HOB
*
@@ -201,9 +192,9 @@ union hob_pointers {
*
* @return: HOB type.
*/
-static inline u16 get_hob_type(union hob_pointers hob)
+static inline u16 get_hob_type(const struct hob_header *hdr)
{
- return hob.hdr->type;
+ return hdr->type;
}
/**
@@ -216,9 +207,9 @@ static inline u16 get_hob_type(union hob_pointers hob)
*
* @return: HOB length.
*/
-static inline u16 get_hob_length(union hob_pointers hob)
+static inline u16 get_hob_length(const struct hob_header *hdr)
{
- return hob.hdr->len;
+ return hdr->len;
}
/**
@@ -227,13 +218,13 @@ static inline u16 get_hob_length(union hob_pointers hob)
* This macro returns a pointer to HOB that follows the HOB specified by hob
* in the HOB List.
*
- * @hob: A pointer to a HOB.
+ * @hdr: A pointer to a HOB.
*
* @return: A pointer to the next HOB in the HOB list.
*/
-static inline void *get_next_hob(union hob_pointers hob)
+static inline const struct hob_header *get_next_hob(const struct hob_header *hdr)
{
- return (void *)(*(u8 **)&(hob) + get_hob_length(hob));
+ return (const struct hob_header *)((u32)hdr + get_hob_length(hdr));
}
/**
@@ -243,14 +234,14 @@ static inline void *get_next_hob(union hob_pointers hob)
* HOB list. If hob is last HOB in the HOB list, then true is returned.
* Otherwise, false is returned.
*
- * @hob: A pointer to a HOB.
+ * @hdr: A pointer to a HOB.
*
- * @retval true: The HOB specified by hob is the last HOB in the HOB list.
- * @retval false: The HOB specified by hob is not the last HOB in the HOB list.
+ * @retval true: The HOB specified by hdr is the last HOB in the HOB list.
+ * @retval false: The HOB specified by hdr is not the last HOB in the HOB list.
*/
-static inline bool end_of_hob(union hob_pointers hob)
+static inline bool end_of_hob(const struct hob_header *hdr)
{
- return get_hob_type(hob) == HOB_TYPE_EOH;
+ return get_hob_type(hdr) == HOB_TYPE_EOH;
}
/**
@@ -260,13 +251,13 @@ static inline bool end_of_hob(union hob_pointers hob)
* This macro returns a pointer to the data buffer in a HOB specified by hob.
* hob is assumed to be a HOB of type HOB_TYPE_GUID_EXT.
*
- * @hob: A pointer to a HOB.
+ * @hdr: A pointer to a HOB.
*
* @return: A pointer to the data buffer in a HOB.
*/
-static inline void *get_guid_hob_data(u8 *hob)
+static inline void *get_guid_hob_data(const struct hob_header *hdr)
{
- return (void *)(hob + sizeof(struct hob_guid));
+ return (void *)((u32)hdr + sizeof(struct hob_guid));
}
/**
@@ -276,14 +267,13 @@ static inline void *get_guid_hob_data(u8 *hob)
* This macro returns the size, in bytes, of the data buffer in a HOB
* specified by hob. hob is assumed to be a HOB of type HOB_TYPE_GUID_EXT.
*
- * @hob: A pointer to a HOB.
+ * @hdr: A pointer to a HOB.
*
* @return: The size of the data buffer.
*/
-static inline u16 get_guid_hob_data_size(u8 *hob)
+static inline u16 get_guid_hob_data_size(const struct hob_header *hdr)
{
- union hob_pointers hob_p = *(union hob_pointers *)hob;
- return get_hob_length(hob_p) - sizeof(struct hob_guid);
+ return get_hob_length(hdr) - sizeof(struct hob_guid);
}
/* FSP specific GUID HOB definitions */
diff --git a/arch/x86/include/asm/arch-queensbay/fsp/fsp_support.h b/arch/x86/include/asm/arch-queensbay/fsp/fsp_support.h
index 3ae1b66..2a3e987 100644
--- a/arch/x86/include/asm/arch-queensbay/fsp/fsp_support.h
+++ b/arch/x86/include/asm/arch-queensbay/fsp/fsp_support.h
@@ -145,7 +145,7 @@ u32 fsp_get_tseg_reserved_mem(const void *hob_list, u32 *len);
*
* @retval: A HOB object with matching type; Otherwise NULL.
*/
-void *fsp_get_next_hob(u16 type, const void *hob_list);
+const struct hob_header *fsp_get_next_hob(u16 type, const void *hob_list);
/**
* Returns the next instance of the matched GUID HOB from the starting HOB.
@@ -155,7 +155,8 @@ void *fsp_get_next_hob(u16 type, const void *hob_list);
*
* @retval: A HOB object with matching GUID; Otherwise NULL.
*/
-void *fsp_get_next_guid_hob(const struct efi_guid *guid, const void *hob_list);
+const struct hob_header *fsp_get_next_guid_hob(const struct efi_guid *guid,
+ const void *hob_list);
/**
* This function retrieves a GUID HOB data buffer and size.
diff --git a/arch/x86/lib/cmd_hob.c b/arch/x86/lib/cmd_hob.c
index b552fe6..8d1f038 100644
--- a/arch/x86/lib/cmd_hob.c
+++ b/arch/x86/lib/cmd_hob.c
@@ -28,20 +28,20 @@ static char *hob_type[] = {
int do_hob(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
- union hob_pointers hob;
+ const struct hob_header *hdr;
u16 type;
char *desc;
int i = 0;
- hob.raw = (u8 *)gd->arch.hob_list;
+ hdr = gd->arch.hob_list;
- printf("HOB list address: 0x%08x\n\n", (unsigned int)hob.raw);
+ printf("HOB list address: 0x%08x\n\n", (unsigned int)hdr);
printf("No. | Address | Type | Length in Bytes\n");
printf("----|----------|---------------------|----------------\n");
- while (!end_of_hob(hob)) {
- printf("%-3d | %08x | ", i, (unsigned int)hob.raw);
- type = get_hob_type(hob);
+ while (!end_of_hob(hdr)) {
+ printf("%-3d | %08x | ", i, (unsigned int)hdr);
+ type = get_hob_type(hdr);
if (type == HOB_TYPE_UNUSED)
desc = "*Unused*";
else if (type == HOB_TYPE_EOH)
@@ -50,8 +50,8 @@ int do_hob(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
desc = hob_type[type];
else
desc = "*Invalid Type*";
- printf("%-19s | %-15d\n", desc, get_hob_length(hob));
- hob.raw = get_next_hob(hob);
+ printf("%-19s | %-15d\n", desc, get_hob_length(hdr));
+ hdr = get_next_hob(hdr);
i++;
}
--
1.8.2.1
